Home / 1,532.49-2,115.18-869.55

Finding the Fourth Proportional to 1,532.49, 2,115.18 and 869.55

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Solution

The fourth proportional to 1,532.49, 2,115.18 and 869.55 is: 1,200.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532.49 : 2,115.18 = 869.55 : x
  2. Step 2: Convert to fraction form
    1,532.49/2,115.18 = 869.55/x
  3. Step 3: Cross multiply
    1,532.49x = 2,115.18 × 869.55
  4. Step 4: Simplify right side
    1,532.49x = 1,839,254.77
  5. Step 5: Solve for x
    x = 1,839,254.77/1,532.49
  6. Step 6: Final answer
    x = 1,200.17

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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.