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Finding the Fourth Proportional to 508,965.02, 763,447.04 and 129,885.78

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Solution

The fourth proportional to 508,965.02, 763,447.04 and 129,885.78 is: 194,828.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,965.02 : 763,447.04 = 129,885.78 : x
  2. Step 2: Convert to fraction form
    508,965.02/763,447.04 = 129,885.78/x
  3. Step 3: Cross multiply
    508,965.02x = 763,447.04 × 129,885.78
  4. Step 4: Simplify right side
    508,965.02x = 99,160,914,279.09
  5. Step 5: Solve for x
    x = 99,160,914,279.09/508,965.02
  6. Step 6: Final answer
    x = 194,828.54

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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.