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Finding the Fourth Proportional to 482,456.70, 665,878.46 and 278,479.76

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Solution

The fourth proportional to 482,456.70, 665,878.46 and 278,479.76 is: 384,352.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,456.70 : 665,878.46 = 278,479.76 : x
  2. Step 2: Convert to fraction form
    482,456.70/665,878.46 = 278,479.76/x
  3. Step 3: Cross multiply
    482,456.70x = 665,878.46 × 278,479.76
  4. Step 4: Simplify right side
    482,456.70x = 185,433,669,008.18
  5. Step 5: Solve for x
    x = 185,433,669,008.18/482,456.70
  6. Step 6: Final answer
    x = 384,352.98

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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.