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Finding the Fourth Proportional to 752.99, 1,039.61 and 517.34

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Solution

The fourth proportional to 752.99, 1,039.61 and 517.34 is: 714.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.99 : 1,039.61 = 517.34 : x
  2. Step 2: Convert to fraction form
    752.99/1,039.61 = 517.34/x
  3. Step 3: Cross multiply
    752.99x = 1,039.61 × 517.34
  4. Step 4: Simplify right side
    752.99x = 537,824.05
  5. Step 5: Solve for x
    x = 537,824.05/752.99
  6. Step 6: Final answer
    x = 714.25

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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.