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Finding the Fourth Proportional to 908,863.80, 1,363,295.70 and 310,500.60

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Solution

The fourth proportional to 908,863.80, 1,363,295.70 and 310,500.60 is: 465,750.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,863.80 : 1,363,295.70 = 310,500.60 : x
  2. Step 2: Convert to fraction form
    908,863.80/1,363,295.70 = 310,500.60/x
  3. Step 3: Cross multiply
    908,863.80x = 1,363,295.70 × 310,500.60
  4. Step 4: Simplify right side
    908,863.80x = 423,304,132,827.42
  5. Step 5: Solve for x
    x = 423,304,132,827.42/908,863.80
  6. Step 6: Final answer
    x = 465,750.90

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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.