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Finding the Fourth Proportional to 1,022.42, 1,534.05 and 693.72

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Solution

The fourth proportional to 1,022.42, 1,534.05 and 693.72 is: 1,040.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.42 : 1,534.05 = 693.72 : x
  2. Step 2: Convert to fraction form
    1,022.42/1,534.05 = 693.72/x
  3. Step 3: Cross multiply
    1,022.42x = 1,534.05 × 693.72
  4. Step 4: Simplify right side
    1,022.42x = 1,064,201.17
  5. Step 5: Solve for x
    x = 1,064,201.17/1,022.42
  6. Step 6: Final answer
    x = 1,040.87

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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.