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Finding the Fourth Proportional to 445.47, 614.82 and 279.82

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Solution

The fourth proportional to 445.47, 614.82 and 279.82 is: 386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.47 : 614.82 = 279.82 : x
  2. Step 2: Convert to fraction form
    445.47/614.82 = 279.82/x
  3. Step 3: Cross multiply
    445.47x = 614.82 × 279.82
  4. Step 4: Simplify right side
    445.47x = 172,038.93
  5. Step 5: Solve for x
    x = 172,038.93/445.47
  6. Step 6: Final answer
    x = 386.20

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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.