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Finding the Fourth Proportional to 531.90, 794.43 and 459

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Solution

The fourth proportional to 531.90, 794.43 and 459 is: 685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.90 : 794.43 = 459 : x
  2. Step 2: Convert to fraction form
    531.90/794.43 = 459/x
  3. Step 3: Cross multiply
    531.90x = 794.43 × 459
  4. Step 4: Simplify right side
    531.90x = 364,643.37
  5. Step 5: Solve for x
    x = 364,643.37/531.90
  6. Step 6: Final answer
    x = 685.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.