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Finding the Fourth Proportional to 290,369.87, 400,640.31 and 169,442.13

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Solution

The fourth proportional to 290,369.87, 400,640.31 and 169,442.13 is: 233,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,369.87 : 400,640.31 = 169,442.13 : x
  2. Step 2: Convert to fraction form
    290,369.87/400,640.31 = 169,442.13/x
  3. Step 3: Cross multiply
    290,369.87x = 400,640.31 × 169,442.13
  4. Step 4: Simplify right side
    290,369.87x = 67,885,347,490.26
  5. Step 5: Solve for x
    x = 67,885,347,490.26/290,369.87
  6. Step 6: Final answer
    x = 233,789.23

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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.