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Finding the Fourth Proportional to 767.68, 1,150.40 and 401.63

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Solution

The fourth proportional to 767.68, 1,150.40 and 401.63 is: 601.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.68 : 1,150.40 = 401.63 : x
  2. Step 2: Convert to fraction form
    767.68/1,150.40 = 401.63/x
  3. Step 3: Cross multiply
    767.68x = 1,150.40 × 401.63
  4. Step 4: Simplify right side
    767.68x = 462,030.40
  5. Step 5: Solve for x
    x = 462,030.40/767.68
  6. Step 6: Final answer
    x = 601.85

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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.