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Finding the Fourth Proportional to 228,912.40, 343,368.60 and 217,248.40

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Solution

The fourth proportional to 228,912.40, 343,368.60 and 217,248.40 is: 325,872.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,912.40 : 343,368.60 = 217,248.40 : x
  2. Step 2: Convert to fraction form
    228,912.40/343,368.60 = 217,248.40/x
  3. Step 3: Cross multiply
    228,912.40x = 343,368.60 × 217,248.40
  4. Step 4: Simplify right side
    228,912.40x = 74,596,278,960.24
  5. Step 5: Solve for x
    x = 74,596,278,960.24/228,912.40
  6. Step 6: Final answer
    x = 325,872.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.