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Finding the Fourth Proportional to 560.28, 839.82 and 286.11

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Solution

The fourth proportional to 560.28, 839.82 and 286.11 is: 428.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.28 : 839.82 = 286.11 : x
  2. Step 2: Convert to fraction form
    560.28/839.82 = 286.11/x
  3. Step 3: Cross multiply
    560.28x = 839.82 × 286.11
  4. Step 4: Simplify right side
    560.28x = 240,280.90
  5. Step 5: Solve for x
    x = 240,280.90/560.28
  6. Step 6: Final answer
    x = 428.86

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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.