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Finding the Fourth Proportional to 639,800.34, 960,291 and 324,478.68

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Solution

The fourth proportional to 639,800.34, 960,291 and 324,478.68 is: 487,017.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,800.34 : 960,291 = 324,478.68 : x
  2. Step 2: Convert to fraction form
    639,800.34/960,291 = 324,478.68/x
  3. Step 3: Cross multiply
    639,800.34x = 960,291 × 324,478.68
  4. Step 4: Simplify right side
    639,800.34x = 311,593,956,095.88
  5. Step 5: Solve for x
    x = 311,593,956,095.88/639,800.34
  6. Step 6: Final answer
    x = 487,017.49

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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.