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Finding the Fourth Proportional to 914.71, 1,371.75 and 265.45

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Solution

The fourth proportional to 914.71, 1,371.75 and 265.45 is: 398.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.71 : 1,371.75 = 265.45 : x
  2. Step 2: Convert to fraction form
    914.71/1,371.75 = 265.45/x
  3. Step 3: Cross multiply
    914.71x = 1,371.75 × 265.45
  4. Step 4: Simplify right side
    914.71x = 364,131.04
  5. Step 5: Solve for x
    x = 364,131.04/914.71
  6. Step 6: Final answer
    x = 398.08

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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.