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Finding the Fourth Proportional to 1,023.93, 1,532.70 and 762.40

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Solution

The fourth proportional to 1,023.93, 1,532.70 and 762.40 is: 1,141.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.93 : 1,532.70 = 762.40 : x
  2. Step 2: Convert to fraction form
    1,023.93/1,532.70 = 762.40/x
  3. Step 3: Cross multiply
    1,023.93x = 1,532.70 × 762.40
  4. Step 4: Simplify right side
    1,023.93x = 1,168,530.48
  5. Step 5: Solve for x
    x = 1,168,530.48/1,023.93
  6. Step 6: Final answer
    x = 1,141.22

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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.