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Finding the Fourth Proportional to 914.28, 1,371.38 and 297.98

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Solution

The fourth proportional to 914.28, 1,371.38 and 297.98 is: 446.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.28 : 1,371.38 = 297.98 : x
  2. Step 2: Convert to fraction form
    914.28/1,371.38 = 297.98/x
  3. Step 3: Cross multiply
    914.28x = 1,371.38 × 297.98
  4. Step 4: Simplify right side
    914.28x = 408,643.81
  5. Step 5: Solve for x
    x = 408,643.81/914.28
  6. Step 6: Final answer
    x = 446.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.