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Finding the Fourth Proportional to 1,264.98, 1,897.47 and 764.75

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Solution

The fourth proportional to 1,264.98, 1,897.47 and 764.75 is: 1,147.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.98 : 1,897.47 = 764.75 : x
  2. Step 2: Convert to fraction form
    1,264.98/1,897.47 = 764.75/x
  3. Step 3: Cross multiply
    1,264.98x = 1,897.47 × 764.75
  4. Step 4: Simplify right side
    1,264.98x = 1,451,086.36
  5. Step 5: Solve for x
    x = 1,451,086.36/1,264.98
  6. Step 6: Final answer
    x = 1,147.12

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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.