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Finding the Fourth Proportional to 1,032.94, 1,424.82 and 812.62

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Solution

The fourth proportional to 1,032.94, 1,424.82 and 812.62 is: 1,120.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.94 : 1,424.82 = 812.62 : x
  2. Step 2: Convert to fraction form
    1,032.94/1,424.82 = 812.62/x
  3. Step 3: Cross multiply
    1,032.94x = 1,424.82 × 812.62
  4. Step 4: Simplify right side
    1,032.94x = 1,157,837.23
  5. Step 5: Solve for x
    x = 1,157,837.23/1,032.94
  6. Step 6: Final answer
    x = 1,120.91

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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.