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Finding the Fourth Proportional to 478,214.40, 715,766.40 and 372,460.80

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Solution

The fourth proportional to 478,214.40, 715,766.40 and 372,460.80 is: 557,479.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,214.40 : 715,766.40 = 372,460.80 : x
  2. Step 2: Convert to fraction form
    478,214.40/715,766.40 = 372,460.80/x
  3. Step 3: Cross multiply
    478,214.40x = 715,766.40 × 372,460.80
  4. Step 4: Simplify right side
    478,214.40x = 266,594,925,957.12
  5. Step 5: Solve for x
    x = 266,594,925,957.12/478,214.40
  6. Step 6: Final answer
    x = 557,479.92

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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.