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Finding the Fourth Proportional to 290,731.80, 435,806.10 and 133,073.40

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Solution

The fourth proportional to 290,731.80, 435,806.10 and 133,073.40 is: 199,476.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,731.80 : 435,806.10 = 133,073.40 : x
  2. Step 2: Convert to fraction form
    290,731.80/435,806.10 = 133,073.40/x
  3. Step 3: Cross multiply
    290,731.80x = 435,806.10 × 133,073.40
  4. Step 4: Simplify right side
    290,731.80x = 57,994,199,467.74
  5. Step 5: Solve for x
    x = 57,994,199,467.74/290,731.80
  6. Step 6: Final answer
    x = 199,476.63

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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.