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Finding the Fourth Proportional to 668.85, 922.18 and 502.53

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Solution

The fourth proportional to 668.85, 922.18 and 502.53 is: 692.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.85 : 922.18 = 502.53 : x
  2. Step 2: Convert to fraction form
    668.85/922.18 = 502.53/x
  3. Step 3: Cross multiply
    668.85x = 922.18 × 502.53
  4. Step 4: Simplify right side
    668.85x = 463,423.12
  5. Step 5: Solve for x
    x = 463,423.12/668.85
  6. Step 6: Final answer
    x = 692.87

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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.