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Finding the Fourth Proportional to 290,439.58, 400,844.21 and 163,115.17

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Solution

The fourth proportional to 290,439.58, 400,844.21 and 163,115.17 is: 225,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,439.58 : 400,844.21 = 163,115.17 : x
  2. Step 2: Convert to fraction form
    290,439.58/400,844.21 = 163,115.17/x
  3. Step 3: Cross multiply
    290,439.58x = 400,844.21 × 163,115.17
  4. Step 4: Simplify right side
    290,439.58x = 65,383,771,457.67
  5. Step 5: Solve for x
    x = 65,383,771,457.67/290,439.58
  6. Step 6: Final answer
    x = 225,120.05

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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.