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Finding the Fourth Proportional to 421,685.73, 632,569.91 and 137,363.58

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Solution

The fourth proportional to 421,685.73, 632,569.91 and 137,363.58 is: 206,058.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,685.73 : 632,569.91 = 137,363.58 : x
  2. Step 2: Convert to fraction form
    421,685.73/632,569.91 = 137,363.58/x
  3. Step 3: Cross multiply
    421,685.73x = 632,569.91 × 137,363.58
  4. Step 4: Simplify right side
    421,685.73x = 86,892,066,751.06
  5. Step 5: Solve for x
    x = 86,892,066,751.06/421,685.73
  6. Step 6: Final answer
    x = 206,058.83

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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.