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Finding the Fourth Proportional to 566.28, 781.20 and 345.15

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Solution

The fourth proportional to 566.28, 781.20 and 345.15 is: 476.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    566.28 : 781.20 = 345.15 : x
  2. Step 2: Convert to fraction form
    566.28/781.20 = 345.15/x
  3. Step 3: Cross multiply
    566.28x = 781.20 × 345.15
  4. Step 4: Simplify right side
    566.28x = 269,631.18
  5. Step 5: Solve for x
    x = 269,631.18/566.28
  6. Step 6: Final answer
    x = 476.14

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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.