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Finding the Fourth Proportional to 478,309.32, 660,071.88 and 263,456.28

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Solution

The fourth proportional to 478,309.32, 660,071.88 and 263,456.28 is: 363,572.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,309.32 : 660,071.88 = 263,456.28 : x
  2. Step 2: Convert to fraction form
    478,309.32/660,071.88 = 263,456.28/x
  3. Step 3: Cross multiply
    478,309.32x = 660,071.88 × 263,456.28
  4. Step 4: Simplify right side
    478,309.32x = 173,900,082,037.41
  5. Step 5: Solve for x
    x = 173,900,082,037.41/478,309.32
  6. Step 6: Final answer
    x = 363,572.43

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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.