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Finding the Fourth Proportional to 454,985.80, 682,478.70 and 139,401.70

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Solution

The fourth proportional to 454,985.80, 682,478.70 and 139,401.70 is: 209,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,985.80 : 682,478.70 = 139,401.70 : x
  2. Step 2: Convert to fraction form
    454,985.80/682,478.70 = 139,401.70/x
  3. Step 3: Cross multiply
    454,985.80x = 682,478.70 × 139,401.70
  4. Step 4: Simplify right side
    454,985.80x = 95,138,690,993.79
  5. Step 5: Solve for x
    x = 95,138,690,993.79/454,985.80
  6. Step 6: Final answer
    x = 209,102.55

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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.