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Finding the Fourth Proportional to 1,343.50, 2,015.16 and 369.61

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Solution

The fourth proportional to 1,343.50, 2,015.16 and 369.61 is: 554.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.50 : 2,015.16 = 369.61 : x
  2. Step 2: Convert to fraction form
    1,343.50/2,015.16 = 369.61/x
  3. Step 3: Cross multiply
    1,343.50x = 2,015.16 × 369.61
  4. Step 4: Simplify right side
    1,343.50x = 744,823.29
  5. Step 5: Solve for x
    x = 744,823.29/1,343.50
  6. Step 6: Final answer
    x = 554.39

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.