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Finding the Fourth Proportional to 639,622.60, 960,048.30 and 324,435.40

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Solution

The fourth proportional to 639,622.60, 960,048.30 and 324,435.40 is: 486,964.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,622.60 : 960,048.30 = 324,435.40 : x
  2. Step 2: Convert to fraction form
    639,622.60/960,048.30 = 324,435.40/x
  3. Step 3: Cross multiply
    639,622.60x = 960,048.30 × 324,435.40
  4. Step 4: Simplify right side
    639,622.60x = 311,473,654,229.82
  5. Step 5: Solve for x
    x = 311,473,654,229.82/639,622.60
  6. Step 6: Final answer
    x = 486,964.74

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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.