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Finding the Fourth Proportional to 391,588.71, 539,381.67 and 276,667.89

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Solution

The fourth proportional to 391,588.71, 539,381.67 and 276,667.89 is: 381,087.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,588.71 : 539,381.67 = 276,667.89 : x
  2. Step 2: Convert to fraction form
    391,588.71/539,381.67 = 276,667.89/x
  3. Step 3: Cross multiply
    391,588.71x = 539,381.67 × 276,667.89
  4. Step 4: Simplify right side
    391,588.71x = 149,229,588,543.58
  5. Step 5: Solve for x
    x = 149,229,588,543.58/391,588.71
  6. Step 6: Final answer
    x = 381,087.57

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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.