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Finding the Fourth Proportional to 508,407.39, 762,607.78 and 129,324.87

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Solution

The fourth proportional to 508,407.39, 762,607.78 and 129,324.87 is: 193,986.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,407.39 : 762,607.78 = 129,324.87 : x
  2. Step 2: Convert to fraction form
    508,407.39/762,607.78 = 129,324.87/x
  3. Step 3: Cross multiply
    508,407.39x = 762,607.78 × 129,324.87
  4. Step 4: Simplify right side
    508,407.39x = 98,624,151,686.18
  5. Step 5: Solve for x
    x = 98,624,151,686.18/508,407.39
  6. Step 6: Final answer
    x = 193,986.46

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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.