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Finding the Fourth Proportional to 478,978.92, 660,978.90 and 264,115.80

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Solution

The fourth proportional to 478,978.92, 660,978.90 and 264,115.80 is: 364,473.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,978.92 : 660,978.90 = 264,115.80 : x
  2. Step 2: Convert to fraction form
    478,978.92/660,978.90 = 264,115.80/x
  3. Step 3: Cross multiply
    478,978.92x = 660,978.90 × 264,115.80
  4. Step 4: Simplify right side
    478,978.92x = 174,574,970,956.62
  5. Step 5: Solve for x
    x = 174,574,970,956.62/478,978.92
  6. Step 6: Final answer
    x = 364,473.18

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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.