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Finding the Fourth Proportional to 340.19, 469.15 and 228.21

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Solution

The fourth proportional to 340.19, 469.15 and 228.21 is: 314.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.19 : 469.15 = 228.21 : x
  2. Step 2: Convert to fraction form
    340.19/469.15 = 228.21/x
  3. Step 3: Cross multiply
    340.19x = 469.15 × 228.21
  4. Step 4: Simplify right side
    340.19x = 107,064.72
  5. Step 5: Solve for x
    x = 107,064.72/340.19
  6. Step 6: Final answer
    x = 314.72

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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.