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Finding the Fourth Proportional to 910.46, 1,365.50 and 261.02

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Solution

The fourth proportional to 910.46, 1,365.50 and 261.02 is: 391.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.46 : 1,365.50 = 261.02 : x
  2. Step 2: Convert to fraction form
    910.46/1,365.50 = 261.02/x
  3. Step 3: Cross multiply
    910.46x = 1,365.50 × 261.02
  4. Step 4: Simplify right side
    910.46x = 356,422.81
  5. Step 5: Solve for x
    x = 356,422.81/910.46
  6. Step 6: Final answer
    x = 391.48

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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.