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Finding the Fourth Proportional to 690.50, 951.86 and 504.20

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Solution

The fourth proportional to 690.50, 951.86 and 504.20 is: 695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.50 : 951.86 = 504.20 : x
  2. Step 2: Convert to fraction form
    690.50/951.86 = 504.20/x
  3. Step 3: Cross multiply
    690.50x = 951.86 × 504.20
  4. Step 4: Simplify right side
    690.50x = 479,920.53
  5. Step 5: Solve for x
    x = 479,920.53/690.50
  6. Step 6: Final answer
    x = 695.04

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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.