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Finding the Fourth Proportional to 797.40, 1,101.60 and 631.08

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Solution

The fourth proportional to 797.40, 1,101.60 and 631.08 is: 871.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.40 : 1,101.60 = 631.08 : x
  2. Step 2: Convert to fraction form
    797.40/1,101.60 = 631.08/x
  3. Step 3: Cross multiply
    797.40x = 1,101.60 × 631.08
  4. Step 4: Simplify right side
    797.40x = 695,197.73
  5. Step 5: Solve for x
    x = 695,197.73/797.40
  6. Step 6: Final answer
    x = 871.83

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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.