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Finding the Fourth Proportional to 767.53, 1,148.46 and 459.60

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Solution

The fourth proportional to 767.53, 1,148.46 and 459.60 is: 687.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.53 : 1,148.46 = 459.60 : x
  2. Step 2: Convert to fraction form
    767.53/1,148.46 = 459.60/x
  3. Step 3: Cross multiply
    767.53x = 1,148.46 × 459.60
  4. Step 4: Simplify right side
    767.53x = 527,832.22
  5. Step 5: Solve for x
    x = 527,832.22/767.53
  6. Step 6: Final answer
    x = 687.70

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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.