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Finding the Fourth Proportional to 505.96, 698.20 and 284.93

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Solution

The fourth proportional to 505.96, 698.20 and 284.93 is: 393.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.96 : 698.20 = 284.93 : x
  2. Step 2: Convert to fraction form
    505.96/698.20 = 284.93/x
  3. Step 3: Cross multiply
    505.96x = 698.20 × 284.93
  4. Step 4: Simplify right side
    505.96x = 198,938.13
  5. Step 5: Solve for x
    x = 198,938.13/505.96
  6. Step 6: Final answer
    x = 393.19

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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.