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Finding the Fourth Proportional to 290,661.20, 436,121.40 and 132,808.40

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Solution

The fourth proportional to 290,661.20, 436,121.40 and 132,808.40 is: 199,271.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,661.20 : 436,121.40 = 132,808.40 : x
  2. Step 2: Convert to fraction form
    290,661.20/436,121.40 = 132,808.40/x
  3. Step 3: Cross multiply
    290,661.20x = 436,121.40 × 132,808.40
  4. Step 4: Simplify right side
    290,661.20x = 57,920,585,339.76
  5. Step 5: Solve for x
    x = 57,920,585,339.76/290,661.20
  6. Step 6: Final answer
    x = 199,271.82

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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.