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Finding the Fourth Proportional to 715.76, 984.60 and 675.44

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Solution

The fourth proportional to 715.76, 984.60 and 675.44 is: 929.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.76 : 984.60 = 675.44 : x
  2. Step 2: Convert to fraction form
    715.76/984.60 = 675.44/x
  3. Step 3: Cross multiply
    715.76x = 984.60 × 675.44
  4. Step 4: Simplify right side
    715.76x = 665,033.30
  5. Step 5: Solve for x
    x = 665,033.30/715.76
  6. Step 6: Final answer
    x = 929.14

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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.