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Finding the Fourth Proportional to 678,458.72, 936,289.92 and 372,565.28

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Solution

The fourth proportional to 678,458.72, 936,289.92 and 372,565.28 is: 514,149.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,458.72 : 936,289.92 = 372,565.28 : x
  2. Step 2: Convert to fraction form
    678,458.72/936,289.92 = 372,565.28/x
  3. Step 3: Cross multiply
    678,458.72x = 936,289.92 × 372,565.28
  4. Step 4: Simplify right side
    678,458.72x = 348,829,116,205.98
  5. Step 5: Solve for x
    x = 348,829,116,205.98/678,458.72
  6. Step 6: Final answer
    x = 514,149.36

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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.