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Finding the Fourth Proportional to 783.73, 1,175.79 and 459.32

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Solution

The fourth proportional to 783.73, 1,175.79 and 459.32 is: 689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.73 : 1,175.79 = 459.32 : x
  2. Step 2: Convert to fraction form
    783.73/1,175.79 = 459.32/x
  3. Step 3: Cross multiply
    783.73x = 1,175.79 × 459.32
  4. Step 4: Simplify right side
    783.73x = 540,063.86
  5. Step 5: Solve for x
    x = 540,063.86/783.73
  6. Step 6: Final answer
    x = 689.09

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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.