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Finding the Fourth Proportional to 678,700.95, 936,618.95 and 372,790.23

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Solution

The fourth proportional to 678,700.95, 936,618.95 and 372,790.23 is: 514,456.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,700.95 : 936,618.95 = 372,790.23 : x
  2. Step 2: Convert to fraction form
    678,700.95/936,618.95 = 372,790.23/x
  3. Step 3: Cross multiply
    678,700.95x = 936,618.95 × 372,790.23
  4. Step 4: Simplify right side
    678,700.95x = 349,162,391,928.91
  5. Step 5: Solve for x
    x = 349,162,391,928.91/678,700.95
  6. Step 6: Final answer
    x = 514,456.91

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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.