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Finding the Fourth Proportional to 340.43, 469.95 and 228.58

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Solution

The fourth proportional to 340.43, 469.95 and 228.58 is: 315.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.43 : 469.95 = 228.58 : x
  2. Step 2: Convert to fraction form
    340.43/469.95 = 228.58/x
  3. Step 3: Cross multiply
    340.43x = 469.95 × 228.58
  4. Step 4: Simplify right side
    340.43x = 107,419.14
  5. Step 5: Solve for x
    x = 107,419.14/340.43
  6. Step 6: Final answer
    x = 315.54

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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.