Home / 780,147.40-1,170,221.10-647,177.80

Finding the Fourth Proportional to 780,147.40, 1,170,221.10 and 647,177.80

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Solution

The fourth proportional to 780,147.40, 1,170,221.10 and 647,177.80 is: 970,766.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,147.40 : 1,170,221.10 = 647,177.80 : x
  2. Step 2: Convert to fraction form
    780,147.40/1,170,221.10 = 647,177.80/x
  3. Step 3: Cross multiply
    780,147.40x = 1,170,221.10 × 647,177.80
  4. Step 4: Simplify right side
    780,147.40x = 757,341,117,011.58
  5. Step 5: Solve for x
    x = 757,341,117,011.58/780,147.40
  6. Step 6: Final answer
    x = 970,766.70

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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.