Home / 1,532.90-2,115.38-869.76

Finding the Fourth Proportional to 1,532.90, 2,115.38 and 869.76

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Solution

The fourth proportional to 1,532.90, 2,115.38 and 869.76 is: 1,200.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532.90 : 2,115.38 = 869.76 : x
  2. Step 2: Convert to fraction form
    1,532.90/2,115.38 = 869.76/x
  3. Step 3: Cross multiply
    1,532.90x = 2,115.38 × 869.76
  4. Step 4: Simplify right side
    1,532.90x = 1,839,875.08
  5. Step 5: Solve for x
    x = 1,839,875.08/1,532.90
  6. Step 6: Final answer
    x = 1,200.26

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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.