Home / 648,015.20-972,022.80-329,150.60

Finding the Fourth Proportional to 648,015.20, 972,022.80 and 329,150.60

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Solution

The fourth proportional to 648,015.20, 972,022.80 and 329,150.60 is: 493,725.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,015.20 : 972,022.80 = 329,150.60 : x
  2. Step 2: Convert to fraction form
    648,015.20/972,022.80 = 329,150.60/x
  3. Step 3: Cross multiply
    648,015.20x = 972,022.80 × 329,150.60
  4. Step 4: Simplify right side
    648,015.20x = 319,941,887,833.68
  5. Step 5: Solve for x
    x = 319,941,887,833.68/648,015.20
  6. Step 6: Final answer
    x = 493,725.90

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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.