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Finding the Fourth Proportional to 399.34, 550.61 and 370.18

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Solution

The fourth proportional to 399.34, 550.61 and 370.18 is: 510.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.34 : 550.61 = 370.18 : x
  2. Step 2: Convert to fraction form
    399.34/550.61 = 370.18/x
  3. Step 3: Cross multiply
    399.34x = 550.61 × 370.18
  4. Step 4: Simplify right side
    399.34x = 203,822.06
  5. Step 5: Solve for x
    x = 203,822.06/399.34
  6. Step 6: Final answer
    x = 510.40

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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.