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Finding the Fourth Proportional to 391,188.96, 539,803.44 and 310,811.04

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Solution

The fourth proportional to 391,188.96, 539,803.44 and 310,811.04 is: 428,889.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,188.96 : 539,803.44 = 310,811.04 : x
  2. Step 2: Convert to fraction form
    391,188.96/539,803.44 = 310,811.04/x
  3. Step 3: Cross multiply
    391,188.96x = 539,803.44 × 310,811.04
  4. Step 4: Simplify right side
    391,188.96x = 167,776,868,581.98
  5. Step 5: Solve for x
    x = 167,776,868,581.98/391,188.96
  6. Step 6: Final answer
    x = 428,889.58

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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.