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Finding the Fourth Proportional to 1,889.15, 2,820.98 and 1,543.15

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Solution

The fourth proportional to 1,889.15, 2,820.98 and 1,543.15 is: 2,304.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.15 : 2,820.98 = 1,543.15 : x
  2. Step 2: Convert to fraction form
    1,889.15/2,820.98 = 1,543.15/x
  3. Step 3: Cross multiply
    1,889.15x = 2,820.98 × 1,543.15
  4. Step 4: Simplify right side
    1,889.15x = 4,353,195.29
  5. Step 5: Solve for x
    x = 4,353,195.29/1,889.15
  6. Step 6: Final answer
    x = 2,304.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.