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Finding the Fourth Proportional to 2,543.16, 3,509.74 and 1,439.16

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Solution

The fourth proportional to 2,543.16, 3,509.74 and 1,439.16 is: 1,986.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.16 : 3,509.74 = 1,439.16 : x
  2. Step 2: Convert to fraction form
    2,543.16/3,509.74 = 1,439.16/x
  3. Step 3: Cross multiply
    2,543.16x = 3,509.74 × 1,439.16
  4. Step 4: Simplify right side
    2,543.16x = 5,051,077.42
  5. Step 5: Solve for x
    x = 5,051,077.42/2,543.16
  6. Step 6: Final answer
    x = 1,986.14

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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.