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Finding the Fourth Proportional to 1,532.64, 2,115 and 903.18

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Solution

The fourth proportional to 1,532.64, 2,115 and 903.18 is: 1,246.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532.64 : 2,115 = 903.18 : x
  2. Step 2: Convert to fraction form
    1,532.64/2,115 = 903.18/x
  3. Step 3: Cross multiply
    1,532.64x = 2,115 × 903.18
  4. Step 4: Simplify right side
    1,532.64x = 1,910,225.70
  5. Step 5: Solve for x
    x = 1,910,225.70/1,532.64
  6. Step 6: Final answer
    x = 1,246.36

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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.