Home / 439,945.20-659,917.80-140,447.70

Finding the Fourth Proportional to 439,945.20, 659,917.80 and 140,447.70

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Solution

The fourth proportional to 439,945.20, 659,917.80 and 140,447.70 is: 210,671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,945.20 : 659,917.80 = 140,447.70 : x
  2. Step 2: Convert to fraction form
    439,945.20/659,917.80 = 140,447.70/x
  3. Step 3: Cross multiply
    439,945.20x = 659,917.80 × 140,447.70
  4. Step 4: Simplify right side
    439,945.20x = 92,683,937,199.06
  5. Step 5: Solve for x
    x = 92,683,937,199.06/439,945.20
  6. Step 6: Final answer
    x = 210,671.55

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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.