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Finding the Fourth Proportional to 1,543.55, 2,315.49 and 556.45

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Solution

The fourth proportional to 1,543.55, 2,315.49 and 556.45 is: 834.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,543.55 : 2,315.49 = 556.45 : x
  2. Step 2: Convert to fraction form
    1,543.55/2,315.49 = 556.45/x
  3. Step 3: Cross multiply
    1,543.55x = 2,315.49 × 556.45
  4. Step 4: Simplify right side
    1,543.55x = 1,288,451.04
  5. Step 5: Solve for x
    x = 1,288,451.04/1,543.55
  6. Step 6: Final answer
    x = 834.73

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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.