Home / 810,003.70-1,215,005.55-491,139.10

Finding the Fourth Proportional to 810,003.70, 1,215,005.55 and 491,139.10

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Solution

The fourth proportional to 810,003.70, 1,215,005.55 and 491,139.10 is: 736,708.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,003.70 : 1,215,005.55 = 491,139.10 : x
  2. Step 2: Convert to fraction form
    810,003.70/1,215,005.55 = 491,139.10/x
  3. Step 3: Cross multiply
    810,003.70x = 1,215,005.55 × 491,139.10
  4. Step 4: Simplify right side
    810,003.70x = 596,736,732,322.01
  5. Step 5: Solve for x
    x = 596,736,732,322.01/810,003.70
  6. Step 6: Final answer
    x = 736,708.65

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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.