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Finding the Fourth Proportional to 560.98, 840.24 and 343.90

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Solution

The fourth proportional to 560.98, 840.24 and 343.90 is: 515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.98 : 840.24 = 343.90 : x
  2. Step 2: Convert to fraction form
    560.98/840.24 = 343.90/x
  3. Step 3: Cross multiply
    560.98x = 840.24 × 343.90
  4. Step 4: Simplify right side
    560.98x = 288,958.54
  5. Step 5: Solve for x
    x = 288,958.54/560.98
  6. Step 6: Final answer
    x = 515.10

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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.