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Finding the Fourth Proportional to 1,022.90, 1,411.01 and 742.81

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Solution

The fourth proportional to 1,022.90, 1,411.01 and 742.81 is: 1,024.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.90 : 1,411.01 = 742.81 : x
  2. Step 2: Convert to fraction form
    1,022.90/1,411.01 = 742.81/x
  3. Step 3: Cross multiply
    1,022.90x = 1,411.01 × 742.81
  4. Step 4: Simplify right side
    1,022.90x = 1,048,112.34
  5. Step 5: Solve for x
    x = 1,048,112.34/1,022.90
  6. Step 6: Final answer
    x = 1,024.65

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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.