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Finding the Fourth Proportional to 914.44, 1,261.02 and 690.93

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Solution

The fourth proportional to 914.44, 1,261.02 and 690.93 is: 952.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.44 : 1,261.02 = 690.93 : x
  2. Step 2: Convert to fraction form
    914.44/1,261.02 = 690.93/x
  3. Step 3: Cross multiply
    914.44x = 1,261.02 × 690.93
  4. Step 4: Simplify right side
    914.44x = 871,275.25
  5. Step 5: Solve for x
    x = 871,275.25/914.44
  6. Step 6: Final answer
    x = 952.80

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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.