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Finding the Fourth Proportional to 849.84, 1,274.96 and 459.84

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Solution

The fourth proportional to 849.84, 1,274.96 and 459.84 is: 689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.84 : 1,274.96 = 459.84 : x
  2. Step 2: Convert to fraction form
    849.84/1,274.96 = 459.84/x
  3. Step 3: Cross multiply
    849.84x = 1,274.96 × 459.84
  4. Step 4: Simplify right side
    849.84x = 586,277.61
  5. Step 5: Solve for x
    x = 586,277.61/849.84
  6. Step 6: Final answer
    x = 689.87

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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.