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Finding the Fourth Proportional to 373.49, 515.40 and 207.70

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Solution

The fourth proportional to 373.49, 515.40 and 207.70 is: 286.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.49 : 515.40 = 207.70 : x
  2. Step 2: Convert to fraction form
    373.49/515.40 = 207.70/x
  3. Step 3: Cross multiply
    373.49x = 515.40 × 207.70
  4. Step 4: Simplify right side
    373.49x = 107,048.58
  5. Step 5: Solve for x
    x = 107,048.58/373.49
  6. Step 6: Final answer
    x = 286.62

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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.