Home / 639,621.60-960,046.80-324,434.40

Finding the Fourth Proportional to 639,621.60, 960,046.80 and 324,434.40

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Solution

The fourth proportional to 639,621.60, 960,046.80 and 324,434.40 is: 486,963.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,621.60 : 960,046.80 = 324,434.40 : x
  2. Step 2: Convert to fraction form
    639,621.60/960,046.80 = 324,434.40/x
  3. Step 3: Cross multiply
    639,621.60x = 960,046.80 × 324,434.40
  4. Step 4: Simplify right side
    639,621.60x = 311,472,207,529.92
  5. Step 5: Solve for x
    x = 311,472,207,529.92/639,621.60
  6. Step 6: Final answer
    x = 486,963.24

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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.