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Finding the Fourth Proportional to 759.25, 1,139.43 and 586.35

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Solution

The fourth proportional to 759.25, 1,139.43 and 586.35 is: 879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.25 : 1,139.43 = 586.35 : x
  2. Step 2: Convert to fraction form
    759.25/1,139.43 = 586.35/x
  3. Step 3: Cross multiply
    759.25x = 1,139.43 × 586.35
  4. Step 4: Simplify right side
    759.25x = 668,106.98
  5. Step 5: Solve for x
    x = 668,106.98/759.25
  6. Step 6: Final answer
    x = 879.96

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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.