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Finding the Fourth Proportional to 2,671.40, 3,686.56 and 1,553.00

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Solution

The fourth proportional to 2,671.40, 3,686.56 and 1,553.00 is: 2,143.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.40 : 3,686.56 = 1,553.00 : x
  2. Step 2: Convert to fraction form
    2,671.40/3,686.56 = 1,553.00/x
  3. Step 3: Cross multiply
    2,671.40x = 3,686.56 × 1,553.00
  4. Step 4: Simplify right side
    2,671.40x = 5,725,205.36
  5. Step 5: Solve for x
    x = 5,725,205.36/2,671.40
  6. Step 6: Final answer
    x = 2,143.15

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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.