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Finding the Fourth Proportional to 759.78, 1,055.07 and 752.58

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Solution

The fourth proportional to 759.78, 1,055.07 and 752.58 is: 1,045.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    759.78 : 1,055.07 = 752.58 : x
  2. Step 2: Convert to fraction form
    759.78/1,055.07 = 752.58/x
  3. Step 3: Cross multiply
    759.78x = 1,055.07 × 752.58
  4. Step 4: Simplify right side
    759.78x = 794,024.58
  5. Step 5: Solve for x
    x = 794,024.58/759.78
  6. Step 6: Final answer
    x = 1,045.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.