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Finding the Fourth Proportional to 391,656.56, 587,515.97 and 167,018.91

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Solution

The fourth proportional to 391,656.56, 587,515.97 and 167,018.91 is: 250,541.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,656.56 : 587,515.97 = 167,018.91 : x
  2. Step 2: Convert to fraction form
    391,656.56/587,515.97 = 167,018.91/x
  3. Step 3: Cross multiply
    391,656.56x = 587,515.97 × 167,018.91
  4. Step 4: Simplify right side
    391,656.56x = 98,126,276,916.99
  5. Step 5: Solve for x
    x = 98,126,276,916.99/391,656.56
  6. Step 6: Final answer
    x = 250,541.64

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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.