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Finding the Fourth Proportional to 639,222.81, 958,585.01 and 239,645.76

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Solution

The fourth proportional to 639,222.81, 958,585.01 and 239,645.76 is: 359,375.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,222.81 : 958,585.01 = 239,645.76 : x
  2. Step 2: Convert to fraction form
    639,222.81/958,585.01 = 239,645.76/x
  3. Step 3: Cross multiply
    639,222.81x = 958,585.01 × 239,645.76
  4. Step 4: Simplify right side
    639,222.81x = 229,720,832,047.83
  5. Step 5: Solve for x
    x = 229,720,832,047.83/639,222.81
  6. Step 6: Final answer
    x = 359,375.21

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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.