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Finding the Fourth Proportional to 296.87, 409.43 and 257.99

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Solution

The fourth proportional to 296.87, 409.43 and 257.99 is: 355.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.87 : 409.43 = 257.99 : x
  2. Step 2: Convert to fraction form
    296.87/409.43 = 257.99/x
  3. Step 3: Cross multiply
    296.87x = 409.43 × 257.99
  4. Step 4: Simplify right side
    296.87x = 105,625.51
  5. Step 5: Solve for x
    x = 105,625.51/296.87
  6. Step 6: Final answer
    x = 355.80

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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.