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Finding the Fourth Proportional to 521,640.90, 782,461.35 and 335,016.90

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Solution

The fourth proportional to 521,640.90, 782,461.35 and 335,016.90 is: 502,525.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,640.90 : 782,461.35 = 335,016.90 : x
  2. Step 2: Convert to fraction form
    521,640.90/782,461.35 = 335,016.90/x
  3. Step 3: Cross multiply
    521,640.90x = 782,461.35 × 335,016.90
  4. Step 4: Simplify right side
    521,640.90x = 262,137,775,846.82
  5. Step 5: Solve for x
    x = 262,137,775,846.82/521,640.90
  6. Step 6: Final answer
    x = 502,525.35

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Double scale
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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.