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Finding the Fourth Proportional to 1,465.24, 2,197.62 and 439

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Solution

The fourth proportional to 1,465.24, 2,197.62 and 439 is: 658.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,465.24 : 2,197.62 = 439 : x
  2. Step 2: Convert to fraction form
    1,465.24/2,197.62 = 439/x
  3. Step 3: Cross multiply
    1,465.24x = 2,197.62 × 439
  4. Step 4: Simplify right side
    1,465.24x = 964,755.18
  5. Step 5: Solve for x
    x = 964,755.18/1,465.24
  6. Step 6: Final answer
    x = 658.43

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Double scale
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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.