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Finding the Fourth Proportional to 690.24, 951.48 and 580.08

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Solution

The fourth proportional to 690.24, 951.48 and 580.08 is: 799.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.24 : 951.48 = 580.08 : x
  2. Step 2: Convert to fraction form
    690.24/951.48 = 580.08/x
  3. Step 3: Cross multiply
    690.24x = 951.48 × 580.08
  4. Step 4: Simplify right side
    690.24x = 551,934.52
  5. Step 5: Solve for x
    x = 551,934.52/690.24
  6. Step 6: Final answer
    x = 799.63

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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.