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Finding the Fourth Proportional to 1,525.46, 2,287.89 and 538.40

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Solution

The fourth proportional to 1,525.46, 2,287.89 and 538.40 is: 807.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,525.46 : 2,287.89 = 538.40 : x
  2. Step 2: Convert to fraction form
    1,525.46/2,287.89 = 538.40/x
  3. Step 3: Cross multiply
    1,525.46x = 2,287.89 × 538.40
  4. Step 4: Simplify right side
    1,525.46x = 1,231,788.54
  5. Step 5: Solve for x
    x = 1,231,788.54/1,525.46
  6. Step 6: Final answer
    x = 807.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.