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Finding the Fourth Proportional to 1,247.99, 1,722.20 and 750.62

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Solution

The fourth proportional to 1,247.99, 1,722.20 and 750.62 is: 1,035.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.99 : 1,722.20 = 750.62 : x
  2. Step 2: Convert to fraction form
    1,247.99/1,722.20 = 750.62/x
  3. Step 3: Cross multiply
    1,247.99x = 1,722.20 × 750.62
  4. Step 4: Simplify right side
    1,247.99x = 1,292,718.32
  5. Step 5: Solve for x
    x = 1,292,718.32/1,247.99
  6. Step 6: Final answer
    x = 1,035.84

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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.