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Finding the Fourth Proportional to 898.88, 1,240.48 and 677.44

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Solution

The fourth proportional to 898.88, 1,240.48 and 677.44 is: 934.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.88 : 1,240.48 = 677.44 : x
  2. Step 2: Convert to fraction form
    898.88/1,240.48 = 677.44/x
  3. Step 3: Cross multiply
    898.88x = 1,240.48 × 677.44
  4. Step 4: Simplify right side
    898.88x = 840,350.77
  5. Step 5: Solve for x
    x = 840,350.77/898.88
  6. Step 6: Final answer
    x = 934.89

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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.