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Finding the Fourth Proportional to 984.70, 1,475.43 and 695.53

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Solution

The fourth proportional to 984.70, 1,475.43 and 695.53 is: 1,042.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.70 : 1,475.43 = 695.53 : x
  2. Step 2: Convert to fraction form
    984.70/1,475.43 = 695.53/x
  3. Step 3: Cross multiply
    984.70x = 1,475.43 × 695.53
  4. Step 4: Simplify right side
    984.70x = 1,026,205.83
  5. Step 5: Solve for x
    x = 1,026,205.83/984.70
  6. Step 6: Final answer
    x = 1,042.15

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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.