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Finding the Fourth Proportional to 758.90, 1,046.18 and 653.54

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Solution

The fourth proportional to 758.90, 1,046.18 and 653.54 is: 900.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.90 : 1,046.18 = 653.54 : x
  2. Step 2: Convert to fraction form
    758.90/1,046.18 = 653.54/x
  3. Step 3: Cross multiply
    758.90x = 1,046.18 × 653.54
  4. Step 4: Simplify right side
    758.90x = 683,716.88
  5. Step 5: Solve for x
    x = 683,716.88/758.90
  6. Step 6: Final answer
    x = 900.93

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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.