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Finding the Fourth Proportional to 969.38, 1,337.79 and 615.17

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Solution

The fourth proportional to 969.38, 1,337.79 and 615.17 is: 848.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.38 : 1,337.79 = 615.17 : x
  2. Step 2: Convert to fraction form
    969.38/1,337.79 = 615.17/x
  3. Step 3: Cross multiply
    969.38x = 1,337.79 × 615.17
  4. Step 4: Simplify right side
    969.38x = 822,968.27
  5. Step 5: Solve for x
    x = 822,968.27/969.38
  6. Step 6: Final answer
    x = 848.96

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Half scale
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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.