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Finding the Fourth Proportional to 2,543.30, 3,509.65 and 1,424.30

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Solution

The fourth proportional to 2,543.30, 3,509.65 and 1,424.30 is: 1,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.30 : 3,509.65 = 1,424.30 : x
  2. Step 2: Convert to fraction form
    2,543.30/3,509.65 = 1,424.30/x
  3. Step 3: Cross multiply
    2,543.30x = 3,509.65 × 1,424.30
  4. Step 4: Simplify right side
    2,543.30x = 4,998,794.50
  5. Step 5: Solve for x
    x = 4,998,794.50/2,543.30
  6. Step 6: Final answer
    x = 1,965.48

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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.