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Finding the Fourth Proportional to 290,392.76, 400,746.72 and 161,339.56

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Solution

The fourth proportional to 290,392.76, 400,746.72 and 161,339.56 is: 222,651.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,392.76 : 400,746.72 = 161,339.56 : x
  2. Step 2: Convert to fraction form
    290,392.76/400,746.72 = 161,339.56/x
  3. Step 3: Cross multiply
    290,392.76x = 400,746.72 × 161,339.56
  4. Step 4: Simplify right side
    290,392.76x = 64,656,299,476.24
  5. Step 5: Solve for x
    x = 64,656,299,476.24/290,392.76
  6. Step 6: Final answer
    x = 222,651.21

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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.