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Finding the Fourth Proportional to 290,740.80, 436,111.20 and 185,246.40

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Solution

The fourth proportional to 290,740.80, 436,111.20 and 185,246.40 is: 277,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,740.80 : 436,111.20 = 185,246.40 : x
  2. Step 2: Convert to fraction form
    290,740.80/436,111.20 = 185,246.40/x
  3. Step 3: Cross multiply
    290,740.80x = 436,111.20 × 185,246.40
  4. Step 4: Simplify right side
    290,740.80x = 80,788,029,799.68
  5. Step 5: Solve for x
    x = 80,788,029,799.68/290,740.80
  6. Step 6: Final answer
    x = 277,869.60

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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.