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Finding the Fourth Proportional to 478,210.40, 715,760.40 and 372,456.80

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Solution

The fourth proportional to 478,210.40, 715,760.40 and 372,456.80 is: 557,473.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,210.40 : 715,760.40 = 372,456.80 : x
  2. Step 2: Convert to fraction form
    478,210.40/715,760.40 = 372,456.80/x
  3. Step 3: Cross multiply
    478,210.40x = 715,760.40 × 372,456.80
  4. Step 4: Simplify right side
    478,210.40x = 266,589,828,150.72
  5. Step 5: Solve for x
    x = 266,589,828,150.72/478,210.40
  6. Step 6: Final answer
    x = 557,473.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.