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Finding the Fourth Proportional to 445.47, 614.51 and 279.39

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Solution

The fourth proportional to 445.47, 614.51 and 279.39 is: 385.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.47 : 614.51 = 279.39 : x
  2. Step 2: Convert to fraction form
    445.47/614.51 = 279.39/x
  3. Step 3: Cross multiply
    445.47x = 614.51 × 279.39
  4. Step 4: Simplify right side
    445.47x = 171,686.55
  5. Step 5: Solve for x
    x = 171,686.55/445.47
  6. Step 6: Final answer
    x = 385.41

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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.