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Finding the Fourth Proportional to 560.10, 840.49 and 354.39

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Solution

The fourth proportional to 560.10, 840.49 and 354.39 is: 531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.10 : 840.49 = 354.39 : x
  2. Step 2: Convert to fraction form
    560.10/840.49 = 354.39/x
  3. Step 3: Cross multiply
    560.10x = 840.49 × 354.39
  4. Step 4: Simplify right side
    560.10x = 297,860.04
  5. Step 5: Solve for x
    x = 297,860.04/560.10
  6. Step 6: Final answer
    x = 531.80

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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.