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Finding the Fourth Proportional to 718,920.61, 992,103.60 and 396,633.31

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Solution

The fourth proportional to 718,920.61, 992,103.60 and 396,633.31 is: 547,350.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,920.61 : 992,103.60 = 396,633.31 : x
  2. Step 2: Convert to fraction form
    718,920.61/992,103.60 = 396,633.31/x
  3. Step 3: Cross multiply
    718,920.61x = 992,103.60 × 396,633.31
  4. Step 4: Simplify right side
    718,920.61x = 393,501,334,730.92
  5. Step 5: Solve for x
    x = 393,501,334,730.92/718,920.61
  6. Step 6: Final answer
    x = 547,350.19

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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.