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Finding the Fourth Proportional to 290,385.76, 400,737.07 and 161,332.56

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Solution

The fourth proportional to 290,385.76, 400,737.07 and 161,332.56 is: 222,641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,385.76 : 400,737.07 = 161,332.56 : x
  2. Step 2: Convert to fraction form
    290,385.76/400,737.07 = 161,332.56/x
  3. Step 3: Cross multiply
    290,385.76x = 400,737.07 × 161,332.56
  4. Step 4: Simplify right side
    290,385.76x = 64,651,937,591.66
  5. Step 5: Solve for x
    x = 64,651,937,591.66/290,385.76
  6. Step 6: Final answer
    x = 222,641.56

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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.