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Finding the Fourth Proportional to 391,895.21, 587,768.94 and 152,008.65

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Solution

The fourth proportional to 391,895.21, 587,768.94 and 152,008.65 is: 227,984.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,895.21 : 587,768.94 = 152,008.65 : x
  2. Step 2: Convert to fraction form
    391,895.21/587,768.94 = 152,008.65/x
  3. Step 3: Cross multiply
    391,895.21x = 587,768.94 × 152,008.65
  4. Step 4: Simplify right side
    391,895.21x = 89,345,963,081.33
  5. Step 5: Solve for x
    x = 89,345,963,081.33/391,895.21
  6. Step 6: Final answer
    x = 227,984.32

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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.