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Finding the Fourth Proportional to 560.28, 840.90 and 286.54

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Solution

The fourth proportional to 560.28, 840.90 and 286.54 is: 430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.28 : 840.90 = 286.54 : x
  2. Step 2: Convert to fraction form
    560.28/840.90 = 286.54/x
  3. Step 3: Cross multiply
    560.28x = 840.90 × 286.54
  4. Step 4: Simplify right side
    560.28x = 240,951.49
  5. Step 5: Solve for x
    x = 240,951.49/560.28
  6. Step 6: Final answer
    x = 430.06

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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.