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Finding the Fourth Proportional to 1,334.82, 2,001.40 and 787.12

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Solution

The fourth proportional to 1,334.82, 2,001.40 and 787.12 is: 1,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.82 : 2,001.40 = 787.12 : x
  2. Step 2: Convert to fraction form
    1,334.82/2,001.40 = 787.12/x
  3. Step 3: Cross multiply
    1,334.82x = 2,001.40 × 787.12
  4. Step 4: Simplify right side
    1,334.82x = 1,575,341.97
  5. Step 5: Solve for x
    x = 1,575,341.97/1,334.82
  6. Step 6: Final answer
    x = 1,180.19

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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.