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Finding the Fourth Proportional to 290,611.80, 435,917.70 and 185,117.40

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Solution

The fourth proportional to 290,611.80, 435,917.70 and 185,117.40 is: 277,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,611.80 : 435,917.70 = 185,117.40 : x
  2. Step 2: Convert to fraction form
    290,611.80/435,917.70 = 185,117.40/x
  3. Step 3: Cross multiply
    290,611.80x = 435,917.70 × 185,117.40
  4. Step 4: Simplify right side
    290,611.80x = 80,695,951,237.98
  5. Step 5: Solve for x
    x = 80,695,951,237.98/290,611.80
  6. Step 6: Final answer
    x = 277,676.10

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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.