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Finding the Fourth Proportional to 1,235.74, 1,705.15 and 704.56

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Solution

The fourth proportional to 1,235.74, 1,705.15 and 704.56 is: 972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.74 : 1,705.15 = 704.56 : x
  2. Step 2: Convert to fraction form
    1,235.74/1,705.15 = 704.56/x
  3. Step 3: Cross multiply
    1,235.74x = 1,705.15 × 704.56
  4. Step 4: Simplify right side
    1,235.74x = 1,201,380.48
  5. Step 5: Solve for x
    x = 1,201,380.48/1,235.74
  6. Step 6: Final answer
    x = 972.20

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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.