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Finding the Fourth Proportional to 765.51, 1,150.07 and 492.14

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Solution

The fourth proportional to 765.51, 1,150.07 and 492.14 is: 739.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.51 : 1,150.07 = 492.14 : x
  2. Step 2: Convert to fraction form
    765.51/1,150.07 = 492.14/x
  3. Step 3: Cross multiply
    765.51x = 1,150.07 × 492.14
  4. Step 4: Simplify right side
    765.51x = 565,987.24
  5. Step 5: Solve for x
    x = 565,987.24/765.51
  6. Step 6: Final answer
    x = 739.36

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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.