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Finding the Fourth Proportional to 669.08, 922.38 and 520.76

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Solution

The fourth proportional to 669.08, 922.38 and 520.76 is: 717.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.08 : 922.38 = 520.76 : x
  2. Step 2: Convert to fraction form
    669.08/922.38 = 520.76/x
  3. Step 3: Cross multiply
    669.08x = 922.38 × 520.76
  4. Step 4: Simplify right side
    669.08x = 480,338.61
  5. Step 5: Solve for x
    x = 480,338.61/669.08
  6. Step 6: Final answer
    x = 717.91

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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.