Home / 278,824.47-384,778.71-157,988.13

Finding the Fourth Proportional to 278,824.47, 384,778.71 and 157,988.13

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Solution

The fourth proportional to 278,824.47, 384,778.71 and 157,988.13 is: 218,024.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,824.47 : 384,778.71 = 157,988.13 : x
  2. Step 2: Convert to fraction form
    278,824.47/384,778.71 = 157,988.13/x
  3. Step 3: Cross multiply
    278,824.47x = 384,778.71 × 157,988.13
  4. Step 4: Simplify right side
    278,824.47x = 60,790,468,856.71
  5. Step 5: Solve for x
    x = 60,790,468,856.71/278,824.47
  6. Step 6: Final answer
    x = 218,024.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.