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Finding the Fourth Proportional to 290,862.80, 436,058.41 and 130,821.55

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Solution

The fourth proportional to 290,862.80, 436,058.41 and 130,821.55 is: 196,126.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,862.80 : 436,058.41 = 130,821.55 : x
  2. Step 2: Convert to fraction form
    290,862.80/436,058.41 = 130,821.55/x
  3. Step 3: Cross multiply
    290,862.80x = 436,058.41 × 130,821.55
  4. Step 4: Simplify right side
    290,862.80x = 57,045,837,086.74
  5. Step 5: Solve for x
    x = 57,045,837,086.74/290,862.80
  6. Step 6: Final answer
    x = 196,126.27

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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.