Home / 658,975.20-987,150.60-378,164.40

Finding the Fourth Proportional to 658,975.20, 987,150.60 and 378,164.40

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Solution

The fourth proportional to 658,975.20, 987,150.60 and 378,164.40 is: 566,493.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,975.20 : 987,150.60 = 378,164.40 : x
  2. Step 2: Convert to fraction form
    658,975.20/987,150.60 = 378,164.40/x
  3. Step 3: Cross multiply
    658,975.20x = 987,150.60 × 378,164.40
  4. Step 4: Simplify right side
    658,975.20x = 373,305,214,358.64
  5. Step 5: Solve for x
    x = 373,305,214,358.64/658,975.20
  6. Step 6: Final answer
    x = 566,493.57

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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.