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Finding the Fourth Proportional to 305,726.70, 421,605.90 and 237,623.52

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Solution

The fourth proportional to 305,726.70, 421,605.90 and 237,623.52 is: 327,689.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,726.70 : 421,605.90 = 237,623.52 : x
  2. Step 2: Convert to fraction form
    305,726.70/421,605.90 = 237,623.52/x
  3. Step 3: Cross multiply
    305,726.70x = 421,605.90 × 237,623.52
  4. Step 4: Simplify right side
    305,726.70x = 100,183,478,010.77
  5. Step 5: Solve for x
    x = 100,183,478,010.77/305,726.70
  6. Step 6: Final answer
    x = 327,689.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.