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Finding the Fourth Proportional to 979.79, 1,352.14 and 560.18

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Solution

The fourth proportional to 979.79, 1,352.14 and 560.18 is: 773.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.79 : 1,352.14 = 560.18 : x
  2. Step 2: Convert to fraction form
    979.79/1,352.14 = 560.18/x
  3. Step 3: Cross multiply
    979.79x = 1,352.14 × 560.18
  4. Step 4: Simplify right side
    979.79x = 757,447.46
  5. Step 5: Solve for x
    x = 757,447.46/979.79
  6. Step 6: Final answer
    x = 773.07

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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.