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Finding the Fourth Proportional to 639,139.59, 958,638.54 and 228,792.65

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Solution

The fourth proportional to 639,139.59, 958,638.54 and 228,792.65 is: 343,163.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,139.59 : 958,638.54 = 228,792.65 : x
  2. Step 2: Convert to fraction form
    639,139.59/958,638.54 = 228,792.65/x
  3. Step 3: Cross multiply
    639,139.59x = 958,638.54 × 228,792.65
  4. Step 4: Simplify right side
    639,139.59x = 219,329,448,023.51
  5. Step 5: Solve for x
    x = 219,329,448,023.51/639,139.59
  6. Step 6: Final answer
    x = 343,163.61

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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.