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Finding the Fourth Proportional to 752.35, 1,035.99 and 689.98

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Solution

The fourth proportional to 752.35, 1,035.99 and 689.98 is: 950.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.35 : 1,035.99 = 689.98 : x
  2. Step 2: Convert to fraction form
    752.35/1,035.99 = 689.98/x
  3. Step 3: Cross multiply
    752.35x = 1,035.99 × 689.98
  4. Step 4: Simplify right side
    752.35x = 714,812.38
  5. Step 5: Solve for x
    x = 714,812.38/752.35
  6. Step 6: Final answer
    x = 950.11

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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.