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Finding the Fourth Proportional to 914.67, 1,261.52 and 803.91

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Solution

The fourth proportional to 914.67, 1,261.52 and 803.91 is: 1,108.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.67 : 1,261.52 = 803.91 : x
  2. Step 2: Convert to fraction form
    914.67/1,261.52 = 803.91/x
  3. Step 3: Cross multiply
    914.67x = 1,261.52 × 803.91
  4. Step 4: Simplify right side
    914.67x = 1,014,144.52
  5. Step 5: Solve for x
    x = 1,014,144.52/914.67
  6. Step 6: Final answer
    x = 1,108.75

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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.