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Finding the Fourth Proportional to 369.79, 555.31 and 355.07

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Solution

The fourth proportional to 369.79, 555.31 and 355.07 is: 533.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.79 : 555.31 = 355.07 : x
  2. Step 2: Convert to fraction form
    369.79/555.31 = 355.07/x
  3. Step 3: Cross multiply
    369.79x = 555.31 × 355.07
  4. Step 4: Simplify right side
    369.79x = 197,172.15
  5. Step 5: Solve for x
    x = 197,172.15/369.79
  6. Step 6: Final answer
    x = 533.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.