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Finding the Fourth Proportional to 1,309.76, 1,806.45 and 955.62

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Solution

The fourth proportional to 1,309.76, 1,806.45 and 955.62 is: 1,318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.76 : 1,806.45 = 955.62 : x
  2. Step 2: Convert to fraction form
    1,309.76/1,806.45 = 955.62/x
  3. Step 3: Cross multiply
    1,309.76x = 1,806.45 × 955.62
  4. Step 4: Simplify right side
    1,309.76x = 1,726,279.75
  5. Step 5: Solve for x
    x = 1,726,279.75/1,309.76
  6. Step 6: Final answer
    x = 1,318.02

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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.