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Finding the Fourth Proportional to 391,670.16, 587,505.57 and 107,363.80

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Solution

The fourth proportional to 391,670.16, 587,505.57 and 107,363.80 is: 161,045.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,670.16 : 587,505.57 = 107,363.80 : x
  2. Step 2: Convert to fraction form
    391,670.16/587,505.57 = 107,363.80/x
  3. Step 3: Cross multiply
    391,670.16x = 587,505.57 × 107,363.80
  4. Step 4: Simplify right side
    391,670.16x = 63,076,830,516.37
  5. Step 5: Solve for x
    x = 63,076,830,516.37/391,670.16
  6. Step 6: Final answer
    x = 161,045.79

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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.