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Finding the Fourth Proportional to 2,543.61, 3,814.89 and 900.21

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Solution

The fourth proportional to 2,543.61, 3,814.89 and 900.21 is: 1,350.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.61 : 3,814.89 = 900.21 : x
  2. Step 2: Convert to fraction form
    2,543.61/3,814.89 = 900.21/x
  3. Step 3: Cross multiply
    2,543.61x = 3,814.89 × 900.21
  4. Step 4: Simplify right side
    2,543.61x = 3,434,202.13
  5. Step 5: Solve for x
    x = 3,434,202.13/2,543.61
  6. Step 6: Final answer
    x = 1,350.13

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1.5x scale

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.