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Finding the Fourth Proportional to 369.90, 511.15 and 357.89

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Solution

The fourth proportional to 369.90, 511.15 and 357.89 is: 494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.90 : 511.15 = 357.89 : x
  2. Step 2: Convert to fraction form
    369.90/511.15 = 357.89/x
  3. Step 3: Cross multiply
    369.90x = 511.15 × 357.89
  4. Step 4: Simplify right side
    369.90x = 182,935.47
  5. Step 5: Solve for x
    x = 182,935.47/369.90
  6. Step 6: Final answer
    x = 494.55

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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.