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Finding the Fourth Proportional to 1,509.44, 2,262.33 and 778.61

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Solution

The fourth proportional to 1,509.44, 2,262.33 and 778.61 is: 1,166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,509.44 : 2,262.33 = 778.61 : x
  2. Step 2: Convert to fraction form
    1,509.44/2,262.33 = 778.61/x
  3. Step 3: Cross multiply
    1,509.44x = 2,262.33 × 778.61
  4. Step 4: Simplify right side
    1,509.44x = 1,761,478.42
  5. Step 5: Solve for x
    x = 1,761,478.42/1,509.44
  6. Step 6: Final answer
    x = 1,166.98

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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.