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Finding the Fourth Proportional to 505.08, 697.10 and 318.44

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Solution

The fourth proportional to 505.08, 697.10 and 318.44 is: 439.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.08 : 697.10 = 318.44 : x
  2. Step 2: Convert to fraction form
    505.08/697.10 = 318.44/x
  3. Step 3: Cross multiply
    505.08x = 697.10 × 318.44
  4. Step 4: Simplify right side
    505.08x = 221,984.52
  5. Step 5: Solve for x
    x = 221,984.52/505.08
  6. Step 6: Final answer
    x = 439.50

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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.