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Finding the Fourth Proportional to 881.98, 1,216.60 and 704.79

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Solution

The fourth proportional to 881.98, 1,216.60 and 704.79 is: 972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.98 : 1,216.60 = 704.79 : x
  2. Step 2: Convert to fraction form
    881.98/1,216.60 = 704.79/x
  3. Step 3: Cross multiply
    881.98x = 1,216.60 × 704.79
  4. Step 4: Simplify right side
    881.98x = 857,456.45
  5. Step 5: Solve for x
    x = 857,456.45/881.98
  6. Step 6: Final answer
    x = 972.20

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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.