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Finding the Fourth Proportional to 290,370.48, 400,709.88 and 163,057.20

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Solution

The fourth proportional to 290,370.48, 400,709.88 and 163,057.20 is: 225,018.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,370.48 : 400,709.88 = 163,057.20 : x
  2. Step 2: Convert to fraction form
    290,370.48/400,709.88 = 163,057.20/x
  3. Step 3: Cross multiply
    290,370.48x = 400,709.88 × 163,057.20
  4. Step 4: Simplify right side
    290,370.48x = 65,338,631,045.14
  5. Step 5: Solve for x
    x = 65,338,631,045.14/290,370.48
  6. Step 6: Final answer
    x = 225,018.16

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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.