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Finding the Fourth Proportional to 3,123.63, 4,685.49 and 932.45

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Solution

The fourth proportional to 3,123.63, 4,685.49 and 932.45 is: 1,398.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.63 : 4,685.49 = 932.45 : x
  2. Step 2: Convert to fraction form
    3,123.63/4,685.49 = 932.45/x
  3. Step 3: Cross multiply
    3,123.63x = 4,685.49 × 932.45
  4. Step 4: Simplify right side
    3,123.63x = 4,368,961.72
  5. Step 5: Solve for x
    x = 4,368,961.72/3,123.63
  6. Step 6: Final answer
    x = 1,398.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.