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Finding the Fourth Proportional to 438.77, 661.14 and 363.42

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Solution

The fourth proportional to 438.77, 661.14 and 363.42 is: 547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.77 : 661.14 = 363.42 : x
  2. Step 2: Convert to fraction form
    438.77/661.14 = 363.42/x
  3. Step 3: Cross multiply
    438.77x = 661.14 × 363.42
  4. Step 4: Simplify right side
    438.77x = 240,271.50
  5. Step 5: Solve for x
    x = 240,271.50/438.77
  6. Step 6: Final answer
    x = 547.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.