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Finding the Fourth Proportional to 1,294.02, 1,785.75 and 704.55

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Solution

The fourth proportional to 1,294.02, 1,785.75 and 704.55 is: 972.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.02 : 1,785.75 = 704.55 : x
  2. Step 2: Convert to fraction form
    1,294.02/1,785.75 = 704.55/x
  3. Step 3: Cross multiply
    1,294.02x = 1,785.75 × 704.55
  4. Step 4: Simplify right side
    1,294.02x = 1,258,150.16
  5. Step 5: Solve for x
    x = 1,258,150.16/1,294.02
  6. Step 6: Final answer
    x = 972.28

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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.