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Finding the Fourth Proportional to 1,294.90, 1,787.12 and 735.54

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Solution

The fourth proportional to 1,294.90, 1,787.12 and 735.54 is: 1,015.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.90 : 1,787.12 = 735.54 : x
  2. Step 2: Convert to fraction form
    1,294.90/1,787.12 = 735.54/x
  3. Step 3: Cross multiply
    1,294.90x = 1,787.12 × 735.54
  4. Step 4: Simplify right side
    1,294.90x = 1,314,499.03
  5. Step 5: Solve for x
    x = 1,314,499.03/1,294.90
  6. Step 6: Final answer
    x = 1,015.14

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1.5x scale

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.