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Finding the Fourth Proportional to 713,138.67, 984,139.07 and 390,841.83

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Solution

The fourth proportional to 713,138.67, 984,139.07 and 390,841.83 is: 539,365.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,138.67 : 984,139.07 = 390,841.83 : x
  2. Step 2: Convert to fraction form
    713,138.67/984,139.07 = 390,841.83/x
  3. Step 3: Cross multiply
    713,138.67x = 984,139.07 × 390,841.83
  4. Step 4: Simplify right side
    713,138.67x = 384,642,713,139.09
  5. Step 5: Solve for x
    x = 384,642,713,139.09/713,138.67
  6. Step 6: Final answer
    x = 539,365.95

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1.5x scale

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.