Home / 811,271.16-1,216,908.81-331,498.97

Finding the Fourth Proportional to 811,271.16, 1,216,908.81 and 331,498.97

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Solution

The fourth proportional to 811,271.16, 1,216,908.81 and 331,498.97 is: 497,249.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,271.16 : 1,216,908.81 = 331,498.97 : x
  2. Step 2: Convert to fraction form
    811,271.16/1,216,908.81 = 331,498.97/x
  3. Step 3: Cross multiply
    811,271.16x = 1,216,908.81 × 331,498.97
  4. Step 4: Simplify right side
    811,271.16x = 403,404,017,098.93
  5. Step 5: Solve for x
    x = 403,404,017,098.93/811,271.16
  6. Step 6: Final answer
    x = 497,249.30

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Half scale
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Double scale
Find fourth proportional to 811,272.16, 1,216,910.31 and 331,499.97
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.