Home / 780,134.30-1,170,201.45-425,840.30

Finding the Fourth Proportional to 780,134.30, 1,170,201.45 and 425,840.30

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Solution

The fourth proportional to 780,134.30, 1,170,201.45 and 425,840.30 is: 638,760.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,134.30 : 1,170,201.45 = 425,840.30 : x
  2. Step 2: Convert to fraction form
    780,134.30/1,170,201.45 = 425,840.30/x
  3. Step 3: Cross multiply
    780,134.30x = 1,170,201.45 × 425,840.30
  4. Step 4: Simplify right side
    780,134.30x = 498,318,936,528.44
  5. Step 5: Solve for x
    x = 498,318,936,528.44/780,134.30
  6. Step 6: Final answer
    x = 638,760.45

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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.