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Finding the Fourth Proportional to 619.92, 925.08 and 555.12

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Solution

The fourth proportional to 619.92, 925.08 and 555.12 is: 828.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.92 : 925.08 = 555.12 : x
  2. Step 2: Convert to fraction form
    619.92/925.08 = 555.12/x
  3. Step 3: Cross multiply
    619.92x = 925.08 × 555.12
  4. Step 4: Simplify right side
    619.92x = 513,530.41
  5. Step 5: Solve for x
    x = 513,530.41/619.92
  6. Step 6: Final answer
    x = 828.38

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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.