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Finding the Fourth Proportional to 505.10, 697.03 and 284.05

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Solution

The fourth proportional to 505.10, 697.03 and 284.05 is: 391.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.10 : 697.03 = 284.05 : x
  2. Step 2: Convert to fraction form
    505.10/697.03 = 284.05/x
  3. Step 3: Cross multiply
    505.10x = 697.03 × 284.05
  4. Step 4: Simplify right side
    505.10x = 197,991.37
  5. Step 5: Solve for x
    x = 197,991.37/505.10
  6. Step 6: Final answer
    x = 391.98

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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.