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Finding the Fourth Proportional to 679.55, 942.59 and 656.24

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Solution

The fourth proportional to 679.55, 942.59 and 656.24 is: 910.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.55 : 942.59 = 656.24 : x
  2. Step 2: Convert to fraction form
    679.55/942.59 = 656.24/x
  3. Step 3: Cross multiply
    679.55x = 942.59 × 656.24
  4. Step 4: Simplify right side
    679.55x = 618,565.26
  5. Step 5: Solve for x
    x = 618,565.26/679.55
  6. Step 6: Final answer
    x = 910.26

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.