Home / 1,532.51-2,115.05-869.57

Finding the Fourth Proportional to 1,532.51, 2,115.05 and 869.57

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Solution

The fourth proportional to 1,532.51, 2,115.05 and 869.57 is: 1,200.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532.51 : 2,115.05 = 869.57 : x
  2. Step 2: Convert to fraction form
    1,532.51/2,115.05 = 869.57/x
  3. Step 3: Cross multiply
    1,532.51x = 2,115.05 × 869.57
  4. Step 4: Simplify right side
    1,532.51x = 1,839,196.27
  5. Step 5: Solve for x
    x = 1,839,196.27/1,532.51
  6. Step 6: Final answer
    x = 1,200.12

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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.