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Finding the Fourth Proportional to 478,309, 660,066.42 and 277,221.64

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Solution

The fourth proportional to 478,309, 660,066.42 and 277,221.64 is: 382,565.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,309 : 660,066.42 = 277,221.64 : x
  2. Step 2: Convert to fraction form
    478,309/660,066.42 = 277,221.64/x
  3. Step 3: Cross multiply
    478,309x = 660,066.42 × 277,221.64
  4. Step 4: Simplify right side
    478,309x = 182,984,695,461.33
  5. Step 5: Solve for x
    x = 182,984,695,461.33/478,309
  6. Step 6: Final answer
    x = 382,565.86

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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.