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Finding the Fourth Proportional to 1,034.24, 1,424.79 and 869.40

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Solution

The fourth proportional to 1,034.24, 1,424.79 and 869.40 is: 1,197.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.24 : 1,424.79 = 869.40 : x
  2. Step 2: Convert to fraction form
    1,034.24/1,424.79 = 869.40/x
  3. Step 3: Cross multiply
    1,034.24x = 1,424.79 × 869.40
  4. Step 4: Simplify right side
    1,034.24x = 1,238,712.43
  5. Step 5: Solve for x
    x = 1,238,712.43/1,034.24
  6. Step 6: Final answer
    x = 1,197.70

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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.