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Finding the Fourth Proportional to 398,860.71, 550,431.29 and 217,573.44

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Solution

The fourth proportional to 398,860.71, 550,431.29 and 217,573.44 is: 300,253.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,860.71 : 550,431.29 = 217,573.44 : x
  2. Step 2: Convert to fraction form
    398,860.71/550,431.29 = 217,573.44/x
  3. Step 3: Cross multiply
    398,860.71x = 550,431.29 × 217,573.44
  4. Step 4: Simplify right side
    398,860.71x = 119,759,229,248.94
  5. Step 5: Solve for x
    x = 119,759,229,248.94/398,860.71
  6. Step 6: Final answer
    x = 300,253.26

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1.5x scale

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.