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Finding the Fourth Proportional to 872,401.10, 1,308,601.65 and 451,805.90

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Solution

The fourth proportional to 872,401.10, 1,308,601.65 and 451,805.90 is: 677,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,401.10 : 1,308,601.65 = 451,805.90 : x
  2. Step 2: Convert to fraction form
    872,401.10/1,308,601.65 = 451,805.90/x
  3. Step 3: Cross multiply
    872,401.10x = 1,308,601.65 × 451,805.90
  4. Step 4: Simplify right side
    872,401.10x = 591,233,946,219.74
  5. Step 5: Solve for x
    x = 591,233,946,219.74/872,401.10
  6. Step 6: Final answer
    x = 677,708.85

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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.