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Finding the Fourth Proportional to 290,722.50, 436,083.74 and 91,058.51

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Solution

The fourth proportional to 290,722.50, 436,083.74 and 91,058.51 is: 136,587.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,722.50 : 436,083.74 = 91,058.51 : x
  2. Step 2: Convert to fraction form
    290,722.50/436,083.74 = 91,058.51/x
  3. Step 3: Cross multiply
    290,722.50x = 436,083.74 × 91,058.51
  4. Step 4: Simplify right side
    290,722.50x = 39,709,132,963.92
  5. Step 5: Solve for x
    x = 39,709,132,963.92/290,722.50
  6. Step 6: Final answer
    x = 136,587.75

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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.