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Finding the Fourth Proportional to 801.65, 1,106.75 and 539.93

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Solution

The fourth proportional to 801.65, 1,106.75 and 539.93 is: 745.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.65 : 1,106.75 = 539.93 : x
  2. Step 2: Convert to fraction form
    801.65/1,106.75 = 539.93/x
  3. Step 3: Cross multiply
    801.65x = 1,106.75 × 539.93
  4. Step 4: Simplify right side
    801.65x = 597,567.53
  5. Step 5: Solve for x
    x = 597,567.53/801.65
  6. Step 6: Final answer
    x = 745.42

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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.