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Finding the Fourth Proportional to 636,009.40, 954,014.10 and 449,385.40

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Solution

The fourth proportional to 636,009.40, 954,014.10 and 449,385.40 is: 674,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,009.40 : 954,014.10 = 449,385.40 : x
  2. Step 2: Convert to fraction form
    636,009.40/954,014.10 = 449,385.40/x
  3. Step 3: Cross multiply
    636,009.40x = 954,014.10 × 449,385.40
  4. Step 4: Simplify right side
    636,009.40x = 428,720,007,934.14
  5. Step 5: Solve for x
    x = 428,720,007,934.14/636,009.40
  6. Step 6: Final answer
    x = 674,078.10

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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.