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Finding the Fourth Proportional to 1,400.19, 2,101.91 and 752.19

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Solution

The fourth proportional to 1,400.19, 2,101.91 and 752.19 is: 1,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.19 : 2,101.91 = 752.19 : x
  2. Step 2: Convert to fraction form
    1,400.19/2,101.91 = 752.19/x
  3. Step 3: Cross multiply
    1,400.19x = 2,101.91 × 752.19
  4. Step 4: Simplify right side
    1,400.19x = 1,581,031.92
  5. Step 5: Solve for x
    x = 1,581,031.92/1,400.19
  6. Step 6: Final answer
    x = 1,129.16

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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.