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Finding the Fourth Proportional to 844.60, 1,165.47 and 490.45

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Solution

The fourth proportional to 844.60, 1,165.47 and 490.45 is: 676.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.60 : 1,165.47 = 490.45 : x
  2. Step 2: Convert to fraction form
    844.60/1,165.47 = 490.45/x
  3. Step 3: Cross multiply
    844.60x = 1,165.47 × 490.45
  4. Step 4: Simplify right side
    844.60x = 571,604.76
  5. Step 5: Solve for x
    x = 571,604.76/844.60
  6. Step 6: Final answer
    x = 676.78

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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.