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Finding the Fourth Proportional to 614.43, 921.35 and 556.11

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Solution

The fourth proportional to 614.43, 921.35 and 556.11 is: 833.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.43 : 921.35 = 556.11 : x
  2. Step 2: Convert to fraction form
    614.43/921.35 = 556.11/x
  3. Step 3: Cross multiply
    614.43x = 921.35 × 556.11
  4. Step 4: Simplify right side
    614.43x = 512,371.47
  5. Step 5: Solve for x
    x = 512,371.47/614.43
  6. Step 6: Final answer
    x = 833.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.