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Finding the Fourth Proportional to 531.78, 733.80 and 298.86

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Solution

The fourth proportional to 531.78, 733.80 and 298.86 is: 412.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.78 : 733.80 = 298.86 : x
  2. Step 2: Convert to fraction form
    531.78/733.80 = 298.86/x
  3. Step 3: Cross multiply
    531.78x = 733.80 × 298.86
  4. Step 4: Simplify right side
    531.78x = 219,303.47
  5. Step 5: Solve for x
    x = 219,303.47/531.78
  6. Step 6: Final answer
    x = 412.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.