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Finding the Fourth Proportional to 290,440.55, 400,813.11 and 161,390.95

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Solution

The fourth proportional to 290,440.55, 400,813.11 and 161,390.95 is: 222,722.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,440.55 : 400,813.11 = 161,390.95 : x
  2. Step 2: Convert to fraction form
    290,440.55/400,813.11 = 161,390.95/x
  3. Step 3: Cross multiply
    290,440.55x = 400,813.11 × 161,390.95
  4. Step 4: Simplify right side
    290,440.55x = 64,687,607,593.32
  5. Step 5: Solve for x
    x = 64,687,607,593.32/290,440.55
  6. Step 6: Final answer
    x = 222,722.37

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1.5x scale

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.