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Finding the Fourth Proportional to 638,696.50, 956,960.22 and 385,444.86

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Solution

The fourth proportional to 638,696.50, 956,960.22 and 385,444.86 is: 577,512.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,696.50 : 956,960.22 = 385,444.86 : x
  2. Step 2: Convert to fraction form
    638,696.50/956,960.22 = 385,444.86/x
  3. Step 3: Cross multiply
    638,696.50x = 956,960.22 × 385,444.86
  4. Step 4: Simplify right side
    638,696.50x = 368,855,398,023.47
  5. Step 5: Solve for x
    x = 368,855,398,023.47/638,696.50
  6. Step 6: Final answer
    x = 577,512.79

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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.