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Finding the Fourth Proportional to 1,532.64, 2,114.95 and 869.43

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Solution

The fourth proportional to 1,532.64, 2,114.95 and 869.43 is: 1,199.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532.64 : 2,114.95 = 869.43 : x
  2. Step 2: Convert to fraction form
    1,532.64/2,114.95 = 869.43/x
  3. Step 3: Cross multiply
    1,532.64x = 2,114.95 × 869.43
  4. Step 4: Simplify right side
    1,532.64x = 1,838,800.98
  5. Step 5: Solve for x
    x = 1,838,800.98/1,532.64
  6. Step 6: Final answer
    x = 1,199.76

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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.