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Finding the Fourth Proportional to 290,490.40, 435,890.40 and 113,003.20

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Solution

The fourth proportional to 290,490.40, 435,890.40 and 113,003.20 is: 169,565.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,490.40 : 435,890.40 = 113,003.20 : x
  2. Step 2: Convert to fraction form
    290,490.40/435,890.40 = 113,003.20/x
  3. Step 3: Cross multiply
    290,490.40x = 435,890.40 × 113,003.20
  4. Step 4: Simplify right side
    290,490.40x = 49,257,010,049.28
  5. Step 5: Solve for x
    x = 49,257,010,049.28/290,490.40
  6. Step 6: Final answer
    x = 169,565.02

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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.