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Finding the Fourth Proportional to 531.86, 801.78 and 486.74

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Solution

The fourth proportional to 531.86, 801.78 and 486.74 is: 733.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.86 : 801.78 = 486.74 : x
  2. Step 2: Convert to fraction form
    531.86/801.78 = 486.74/x
  3. Step 3: Cross multiply
    531.86x = 801.78 × 486.74
  4. Step 4: Simplify right side
    531.86x = 390,258.40
  5. Step 5: Solve for x
    x = 390,258.40/531.86
  6. Step 6: Final answer
    x = 733.76

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.