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Finding the Fourth Proportional to 387.54, 577.40 and 369.18

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Solution

The fourth proportional to 387.54, 577.40 and 369.18 is: 550.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.54 : 577.40 = 369.18 : x
  2. Step 2: Convert to fraction form
    387.54/577.40 = 369.18/x
  3. Step 3: Cross multiply
    387.54x = 577.40 × 369.18
  4. Step 4: Simplify right side
    387.54x = 213,162.69
  5. Step 5: Solve for x
    x = 213,162.69/387.54
  6. Step 6: Final answer
    x = 550.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.