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Finding the Fourth Proportional to 908,857.80, 1,363,286.70 and 820,384.20

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Solution

The fourth proportional to 908,857.80, 1,363,286.70 and 820,384.20 is: 1,230,576.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,857.80 : 1,363,286.70 = 820,384.20 : x
  2. Step 2: Convert to fraction form
    908,857.80/1,363,286.70 = 820,384.20/x
  3. Step 3: Cross multiply
    908,857.80x = 1,363,286.70 × 820,384.20
  4. Step 4: Simplify right side
    908,857.80x = 1,118,418,868,750.14
  5. Step 5: Solve for x
    x = 1,118,418,868,750.14/908,857.80
  6. Step 6: Final answer
    x = 1,230,576.30

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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.