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Finding the Fourth Proportional to 290,368.75, 400,695.24 and 161,315.55

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Solution

The fourth proportional to 290,368.75, 400,695.24 and 161,315.55 is: 222,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,368.75 : 400,695.24 = 161,315.55 : x
  2. Step 2: Convert to fraction form
    290,368.75/400,695.24 = 161,315.55/x
  3. Step 3: Cross multiply
    290,368.75x = 400,695.24 × 161,315.55
  4. Step 4: Simplify right side
    290,368.75x = 64,638,370,212.93
  5. Step 5: Solve for x
    x = 64,638,370,212.93/290,368.75
  6. Step 6: Final answer
    x = 222,607.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.