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Finding the Fourth Proportional to 1,747.68, 2,411.68 and 961.76

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Solution

The fourth proportional to 1,747.68, 2,411.68 and 961.76 is: 1,327.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,747.68 : 2,411.68 = 961.76 : x
  2. Step 2: Convert to fraction form
    1,747.68/2,411.68 = 961.76/x
  3. Step 3: Cross multiply
    1,747.68x = 2,411.68 × 961.76
  4. Step 4: Simplify right side
    1,747.68x = 2,319,457.36
  5. Step 5: Solve for x
    x = 2,319,457.36/1,747.68
  6. Step 6: Final answer
    x = 1,327.16

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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.