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Finding the Fourth Proportional to 340.86, 508.43 and 318.18

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Solution

The fourth proportional to 340.86, 508.43 and 318.18 is: 474.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.86 : 508.43 = 318.18 : x
  2. Step 2: Convert to fraction form
    340.86/508.43 = 318.18/x
  3. Step 3: Cross multiply
    340.86x = 508.43 × 318.18
  4. Step 4: Simplify right side
    340.86x = 161,770.67
  5. Step 5: Solve for x
    x = 161,770.67/340.86
  6. Step 6: Final answer
    x = 474.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.