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Finding the Fourth Proportional to 373.10, 515.03 and 290.43

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Solution

The fourth proportional to 373.10, 515.03 and 290.43 is: 400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.10 : 515.03 = 290.43 : x
  2. Step 2: Convert to fraction form
    373.10/515.03 = 290.43/x
  3. Step 3: Cross multiply
    373.10x = 515.03 × 290.43
  4. Step 4: Simplify right side
    373.10x = 149,578.71
  5. Step 5: Solve for x
    x = 149,578.71/373.10
  6. Step 6: Final answer
    x = 400.91

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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.