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Finding the Fourth Proportional to 290,371.80, 435,351.78 and 112,729.08

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Solution

The fourth proportional to 290,371.80, 435,351.78 and 112,729.08 is: 169,013.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,371.80 : 435,351.78 = 112,729.08 : x
  2. Step 2: Convert to fraction form
    290,371.80/435,351.78 = 112,729.08/x
  3. Step 3: Cross multiply
    290,371.80x = 435,351.78 × 112,729.08
  4. Step 4: Simplify right side
    290,371.80x = 49,076,805,635.76
  5. Step 5: Solve for x
    x = 49,076,805,635.76/290,371.80
  6. Step 6: Final answer
    x = 169,013.68

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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.