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Finding the Fourth Proportional to 660.10, 909.76 and 502.39

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Solution

The fourth proportional to 660.10, 909.76 and 502.39 is: 692.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.10 : 909.76 = 502.39 : x
  2. Step 2: Convert to fraction form
    660.10/909.76 = 502.39/x
  3. Step 3: Cross multiply
    660.10x = 909.76 × 502.39
  4. Step 4: Simplify right side
    660.10x = 457,054.33
  5. Step 5: Solve for x
    x = 457,054.33/660.10
  6. Step 6: Final answer
    x = 692.40

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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.