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Finding the Fourth Proportional to 397,358.09, 548,357.02 and 216,068.72

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Solution

The fourth proportional to 397,358.09, 548,357.02 and 216,068.72 is: 298,176.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,358.09 : 548,357.02 = 216,068.72 : x
  2. Step 2: Convert to fraction form
    397,358.09/548,357.02 = 216,068.72/x
  3. Step 3: Cross multiply
    397,358.09x = 548,357.02 × 216,068.72
  4. Step 4: Simplify right side
    397,358.09x = 118,482,799,414.41
  5. Step 5: Solve for x
    x = 118,482,799,414.41/397,358.09
  6. Step 6: Final answer
    x = 298,176.39

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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.