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Finding the Fourth Proportional to 1,251.40, 1,877.10 and 1,243.30

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Solution

The fourth proportional to 1,251.40, 1,877.10 and 1,243.30 is: 1,864.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.40 : 1,877.10 = 1,243.30 : x
  2. Step 2: Convert to fraction form
    1,251.40/1,877.10 = 1,243.30/x
  3. Step 3: Cross multiply
    1,251.40x = 1,877.10 × 1,243.30
  4. Step 4: Simplify right side
    1,251.40x = 2,333,798.43
  5. Step 5: Solve for x
    x = 2,333,798.43/1,251.40
  6. Step 6: Final answer
    x = 1,864.95

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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.