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Finding the Fourth Proportional to 639,308.70, 959,400.45 and 354,998.70

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Solution

The fourth proportional to 639,308.70, 959,400.45 and 354,998.70 is: 532,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,308.70 : 959,400.45 = 354,998.70 : x
  2. Step 2: Convert to fraction form
    639,308.70/959,400.45 = 354,998.70/x
  3. Step 3: Cross multiply
    639,308.70x = 959,400.45 × 354,998.70
  4. Step 4: Simplify right side
    639,308.70x = 340,585,912,529.42
  5. Step 5: Solve for x
    x = 340,585,912,529.42/639,308.70
  6. Step 6: Final answer
    x = 532,740.93

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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.