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Finding the Fourth Proportional to 979.19, 1,351.59 and 606.18

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Solution

The fourth proportional to 979.19, 1,351.59 and 606.18 is: 836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.19 : 1,351.59 = 606.18 : x
  2. Step 2: Convert to fraction form
    979.19/1,351.59 = 606.18/x
  3. Step 3: Cross multiply
    979.19x = 1,351.59 × 606.18
  4. Step 4: Simplify right side
    979.19x = 819,309.62
  5. Step 5: Solve for x
    x = 819,309.62/979.19
  6. Step 6: Final answer
    x = 836.72

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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.