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Finding the Fourth Proportional to 297.13, 409.48 and 257.67

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Solution

The fourth proportional to 297.13, 409.48 and 257.67 is: 355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.13 : 409.48 = 257.67 : x
  2. Step 2: Convert to fraction form
    297.13/409.48 = 257.67/x
  3. Step 3: Cross multiply
    297.13x = 409.48 × 257.67
  4. Step 4: Simplify right side
    297.13x = 105,510.71
  5. Step 5: Solve for x
    x = 105,510.71/297.13
  6. Step 6: Final answer
    x = 355.10

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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.