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Finding the Fourth Proportional to 2,812.59, 3,881.40 and 1,553.70

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Solution

The fourth proportional to 2,812.59, 3,881.40 and 1,553.70 is: 2,144.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.59 : 3,881.40 = 1,553.70 : x
  2. Step 2: Convert to fraction form
    2,812.59/3,881.40 = 1,553.70/x
  3. Step 3: Cross multiply
    2,812.59x = 3,881.40 × 1,553.70
  4. Step 4: Simplify right side
    2,812.59x = 6,030,531.18
  5. Step 5: Solve for x
    x = 6,030,531.18/2,812.59
  6. Step 6: Final answer
    x = 2,144.12

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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.