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Finding the Fourth Proportional to 387,806.86, 581,705.97 and 151,315.66

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Solution

The fourth proportional to 387,806.86, 581,705.97 and 151,315.66 is: 226,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,806.86 : 581,705.97 = 151,315.66 : x
  2. Step 2: Convert to fraction form
    387,806.86/581,705.97 = 151,315.66/x
  3. Step 3: Cross multiply
    387,806.86x = 581,705.97 × 151,315.66
  4. Step 4: Simplify right side
    387,806.86x = 88,021,222,776.49
  5. Step 5: Solve for x
    x = 88,021,222,776.49/387,806.86
  6. Step 6: Final answer
    x = 226,971.80

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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.