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Finding the Fourth Proportional to 478,308.45, 660,070.13 and 263,449.29

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Solution

The fourth proportional to 478,308.45, 660,070.13 and 263,449.29 is: 363,562.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,308.45 : 660,070.13 = 263,449.29 : x
  2. Step 2: Convert to fraction form
    478,308.45/660,070.13 = 263,449.29/x
  3. Step 3: Cross multiply
    478,308.45x = 660,070.13 × 263,449.29
  4. Step 4: Simplify right side
    478,308.45x = 173,895,005,781.46
  5. Step 5: Solve for x
    x = 173,895,005,781.46/478,308.45
  6. Step 6: Final answer
    x = 363,562.48

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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.