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Finding the Fourth Proportional to 478,218.40, 715,772.40 and 372,464.80

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Solution

The fourth proportional to 478,218.40, 715,772.40 and 372,464.80 is: 557,485.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,218.40 : 715,772.40 = 372,464.80 : x
  2. Step 2: Convert to fraction form
    478,218.40/715,772.40 = 372,464.80/x
  3. Step 3: Cross multiply
    478,218.40x = 715,772.40 × 372,464.80
  4. Step 4: Simplify right side
    478,218.40x = 266,600,023,811.52
  5. Step 5: Solve for x
    x = 266,600,023,811.52/478,218.40
  6. Step 6: Final answer
    x = 557,485.92

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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.