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Finding the Fourth Proportional to 708,336.73, 977,479.68 and 386,040.43

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Solution

The fourth proportional to 708,336.73, 977,479.68 and 386,040.43 is: 532,722.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,336.73 : 977,479.68 = 386,040.43 : x
  2. Step 2: Convert to fraction form
    708,336.73/977,479.68 = 386,040.43/x
  3. Step 3: Cross multiply
    708,336.73x = 977,479.68 × 386,040.43
  4. Step 4: Simplify right side
    708,336.73x = 377,346,675,983.46
  5. Step 5: Solve for x
    x = 377,346,675,983.46/708,336.73
  6. Step 6: Final answer
    x = 532,722.16

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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.