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Finding the Fourth Proportional to 1,147.95, 1,584.03 and 775.74

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Solution

The fourth proportional to 1,147.95, 1,584.03 and 775.74 is: 1,070.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.95 : 1,584.03 = 775.74 : x
  2. Step 2: Convert to fraction form
    1,147.95/1,584.03 = 775.74/x
  3. Step 3: Cross multiply
    1,147.95x = 1,584.03 × 775.74
  4. Step 4: Simplify right side
    1,147.95x = 1,228,795.43
  5. Step 5: Solve for x
    x = 1,228,795.43/1,147.95
  6. Step 6: Final answer
    x = 1,070.43

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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.