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Finding the Fourth Proportional to 478,641.78, 717,285.69 and 265,503.60

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Solution

The fourth proportional to 478,641.78, 717,285.69 and 265,503.60 is: 397,879.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,641.78 : 717,285.69 = 265,503.60 : x
  2. Step 2: Convert to fraction form
    478,641.78/717,285.69 = 265,503.60/x
  3. Step 3: Cross multiply
    478,641.78x = 717,285.69 × 265,503.60
  4. Step 4: Simplify right side
    478,641.78x = 190,441,932,923.48
  5. Step 5: Solve for x
    x = 190,441,932,923.48/478,641.78
  6. Step 6: Final answer
    x = 397,879.88

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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.