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Finding the Fourth Proportional to 668.35, 921.49 and 502.03

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Solution

The fourth proportional to 668.35, 921.49 and 502.03 is: 692.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.35 : 921.49 = 502.03 : x
  2. Step 2: Convert to fraction form
    668.35/921.49 = 502.03/x
  3. Step 3: Cross multiply
    668.35x = 921.49 × 502.03
  4. Step 4: Simplify right side
    668.35x = 462,615.62
  5. Step 5: Solve for x
    x = 462,615.62/668.35
  6. Step 6: Final answer
    x = 692.18

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1.5x scale

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.