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Finding the Fourth Proportional to 932.20, 1,277.40 and 898.20

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Solution

The fourth proportional to 932.20, 1,277.40 and 898.20 is: 1,230.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.20 : 1,277.40 = 898.20 : x
  2. Step 2: Convert to fraction form
    932.20/1,277.40 = 898.20/x
  3. Step 3: Cross multiply
    932.20x = 1,277.40 × 898.20
  4. Step 4: Simplify right side
    932.20x = 1,147,360.68
  5. Step 5: Solve for x
    x = 1,147,360.68/932.20
  6. Step 6: Final answer
    x = 1,230.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.