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Finding the Fourth Proportional to 710.92, 979.59 and 553.60

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Solution

The fourth proportional to 710.92, 979.59 and 553.60 is: 762.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.92 : 979.59 = 553.60 : x
  2. Step 2: Convert to fraction form
    710.92/979.59 = 553.60/x
  3. Step 3: Cross multiply
    710.92x = 979.59 × 553.60
  4. Step 4: Simplify right side
    710.92x = 542,301.02
  5. Step 5: Solve for x
    x = 542,301.02/710.92
  6. Step 6: Final answer
    x = 762.82

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Double scale
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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.