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Finding the Fourth Proportional to 887,998.80, 1,331,998.20 and 326,960.40

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Solution

The fourth proportional to 887,998.80, 1,331,998.20 and 326,960.40 is: 490,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,998.80 : 1,331,998.20 = 326,960.40 : x
  2. Step 2: Convert to fraction form
    887,998.80/1,331,998.20 = 326,960.40/x
  3. Step 3: Cross multiply
    887,998.80x = 1,331,998.20 × 326,960.40
  4. Step 4: Simplify right side
    887,998.80x = 435,510,664,271.28
  5. Step 5: Solve for x
    x = 435,510,664,271.28/887,998.80
  6. Step 6: Final answer
    x = 490,440.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.