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Finding the Fourth Proportional to 3,147.65, 4,343.93 and 1,731.30

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Solution

The fourth proportional to 3,147.65, 4,343.93 and 1,731.30 is: 2,389.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.65 : 4,343.93 = 1,731.30 : x
  2. Step 2: Convert to fraction form
    3,147.65/4,343.93 = 1,731.30/x
  3. Step 3: Cross multiply
    3,147.65x = 4,343.93 × 1,731.30
  4. Step 4: Simplify right side
    3,147.65x = 7,520,646.01
  5. Step 5: Solve for x
    x = 7,520,646.01/3,147.65
  6. Step 6: Final answer
    x = 2,389.29

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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.