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Finding the Fourth Proportional to 709.19, 976.26 and 615.39

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Solution

The fourth proportional to 709.19, 976.26 and 615.39 is: 847.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.19 : 976.26 = 615.39 : x
  2. Step 2: Convert to fraction form
    709.19/976.26 = 615.39/x
  3. Step 3: Cross multiply
    709.19x = 976.26 × 615.39
  4. Step 4: Simplify right side
    709.19x = 600,772.68
  5. Step 5: Solve for x
    x = 600,772.68/709.19
  6. Step 6: Final answer
    x = 847.13

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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.