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Finding the Fourth Proportional to 619.15, 928.64 and 433.49

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Solution

The fourth proportional to 619.15, 928.64 and 433.49 is: 650.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.15 : 928.64 = 433.49 : x
  2. Step 2: Convert to fraction form
    619.15/928.64 = 433.49/x
  3. Step 3: Cross multiply
    619.15x = 928.64 × 433.49
  4. Step 4: Simplify right side
    619.15x = 402,556.15
  5. Step 5: Solve for x
    x = 402,556.15/619.15
  6. Step 6: Final answer
    x = 650.18

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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.