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Finding the Fourth Proportional to 505.45, 697.58 and 284.44

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Solution

The fourth proportional to 505.45, 697.58 and 284.44 is: 392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.45 : 697.58 = 284.44 : x
  2. Step 2: Convert to fraction form
    505.45/697.58 = 284.44/x
  3. Step 3: Cross multiply
    505.45x = 697.58 × 284.44
  4. Step 4: Simplify right side
    505.45x = 198,419.71
  5. Step 5: Solve for x
    x = 198,419.71/505.45
  6. Step 6: Final answer
    x = 392.56

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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.