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Finding the Fourth Proportional to 639,209.94, 958,565.72 and 239,632.70

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Solution

The fourth proportional to 639,209.94, 958,565.72 and 239,632.70 is: 359,355.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,209.94 : 958,565.72 = 239,632.70 : x
  2. Step 2: Convert to fraction form
    639,209.94/958,565.72 = 239,632.70/x
  3. Step 3: Cross multiply
    639,209.94x = 958,565.72 × 239,632.70
  4. Step 4: Simplify right side
    639,209.94x = 229,703,685,620.05
  5. Step 5: Solve for x
    x = 229,703,685,620.05/639,209.94
  6. Step 6: Final answer
    x = 359,355.62

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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.