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Finding the Fourth Proportional to 560.31, 840.13 and 329.09

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Solution

The fourth proportional to 560.31, 840.13 and 329.09 is: 493.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.31 : 840.13 = 329.09 : x
  2. Step 2: Convert to fraction form
    560.31/840.13 = 329.09/x
  3. Step 3: Cross multiply
    560.31x = 840.13 × 329.09
  4. Step 4: Simplify right side
    560.31x = 276,478.38
  5. Step 5: Solve for x
    x = 276,478.38/560.31
  6. Step 6: Final answer
    x = 493.44

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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.