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Finding the Fourth Proportional to 560.18, 840.32 and 231.05

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Solution

The fourth proportional to 560.18, 840.32 and 231.05 is: 346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.18 : 840.32 = 231.05 : x
  2. Step 2: Convert to fraction form
    560.18/840.32 = 231.05/x
  3. Step 3: Cross multiply
    560.18x = 840.32 × 231.05
  4. Step 4: Simplify right side
    560.18x = 194,159.05
  5. Step 5: Solve for x
    x = 194,159.05/560.18
  6. Step 6: Final answer
    x = 346.60

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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.