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Finding the Fourth Proportional to 424,778.21, 636,969.76 and 154,718.34

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Solution

The fourth proportional to 424,778.21, 636,969.76 and 154,718.34 is: 232,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,778.21 : 636,969.76 = 154,718.34 : x
  2. Step 2: Convert to fraction form
    424,778.21/636,969.76 = 154,718.34/x
  3. Step 3: Cross multiply
    424,778.21x = 636,969.76 × 154,718.34
  4. Step 4: Simplify right side
    424,778.21x = 98,550,901,121.97
  5. Step 5: Solve for x
    x = 98,550,901,121.97/424,778.21
  6. Step 6: Final answer
    x = 232,005.55

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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.