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Finding the Fourth Proportional to 391.03, 583.74 and 363.69

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Solution

The fourth proportional to 391.03, 583.74 and 363.69 is: 542.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391.03 : 583.74 = 363.69 : x
  2. Step 2: Convert to fraction form
    391.03/583.74 = 363.69/x
  3. Step 3: Cross multiply
    391.03x = 583.74 × 363.69
  4. Step 4: Simplify right side
    391.03x = 212,300.40
  5. Step 5: Solve for x
    x = 212,300.40/391.03
  6. Step 6: Final answer
    x = 542.93

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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.