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Finding the Fourth Proportional to 403.84, 602.36 and 391.69

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Solution

The fourth proportional to 403.84, 602.36 and 391.69 is: 584.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.84 : 602.36 = 391.69 : x
  2. Step 2: Convert to fraction form
    403.84/602.36 = 391.69/x
  3. Step 3: Cross multiply
    403.84x = 602.36 × 391.69
  4. Step 4: Simplify right side
    403.84x = 235,938.39
  5. Step 5: Solve for x
    x = 235,938.39/403.84
  6. Step 6: Final answer
    x = 584.24

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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.