Home / 780,057.90-1,170,086.85-647,088.30

Finding the Fourth Proportional to 780,057.90, 1,170,086.85 and 647,088.30

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Solution

The fourth proportional to 780,057.90, 1,170,086.85 and 647,088.30 is: 970,632.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,057.90 : 1,170,086.85 = 647,088.30 : x
  2. Step 2: Convert to fraction form
    780,057.90/1,170,086.85 = 647,088.30/x
  3. Step 3: Cross multiply
    780,057.90x = 1,170,086.85 × 647,088.30
  4. Step 4: Simplify right side
    780,057.90x = 757,149,510,618.86
  5. Step 5: Solve for x
    x = 757,149,510,618.86/780,057.90
  6. Step 6: Final answer
    x = 970,632.45

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Half scale
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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.