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Finding the Fourth Proportional to 290,366.88, 400,717.61 and 161,315.10

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Solution

The fourth proportional to 290,366.88, 400,717.61 and 161,315.10 is: 222,621.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,366.88 : 400,717.61 = 161,315.10 : x
  2. Step 2: Convert to fraction form
    290,366.88/400,717.61 = 161,315.10/x
  3. Step 3: Cross multiply
    290,366.88x = 400,717.61 × 161,315.10
  4. Step 4: Simplify right side
    290,366.88x = 64,641,801,328.91
  5. Step 5: Solve for x
    x = 64,641,801,328.91/290,366.88
  6. Step 6: Final answer
    x = 222,621.12

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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.