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Finding the Fourth Proportional to 690.58, 951.78 and 610.12

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Solution

The fourth proportional to 690.58, 951.78 and 610.12 is: 840.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.58 : 951.78 = 610.12 : x
  2. Step 2: Convert to fraction form
    690.58/951.78 = 610.12/x
  3. Step 3: Cross multiply
    690.58x = 951.78 × 610.12
  4. Step 4: Simplify right side
    690.58x = 580,700.01
  5. Step 5: Solve for x
    x = 580,700.01/690.58
  6. Step 6: Final answer
    x = 840.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.