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Finding the Fourth Proportional to 611,279.79, 916,876.38 and 161,990.70

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Solution

The fourth proportional to 611,279.79, 916,876.38 and 161,990.70 is: 242,974.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,279.79 : 916,876.38 = 161,990.70 : x
  2. Step 2: Convert to fraction form
    611,279.79/916,876.38 = 161,990.70/x
  3. Step 3: Cross multiply
    611,279.79x = 916,876.38 × 161,990.70
  4. Step 4: Simplify right side
    611,279.79x = 148,525,446,609.67
  5. Step 5: Solve for x
    x = 148,525,446,609.67/611,279.79
  6. Step 6: Final answer
    x = 242,974.57

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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.