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Finding the Fourth Proportional to 397,679.16, 548,789.10 and 216,394.68

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Solution

The fourth proportional to 397,679.16, 548,789.10 and 216,394.68 is: 298,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,679.16 : 548,789.10 = 216,394.68 : x
  2. Step 2: Convert to fraction form
    397,679.16/548,789.10 = 216,394.68/x
  3. Step 3: Cross multiply
    397,679.16x = 548,789.10 × 216,394.68
  4. Step 4: Simplify right side
    397,679.16x = 118,755,041,681.99
  5. Step 5: Solve for x
    x = 118,755,041,681.99/397,679.16
  6. Step 6: Final answer
    x = 298,620.23

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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.