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Finding the Fourth Proportional to 619.72, 925.25 and 558.28

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Solution

The fourth proportional to 619.72, 925.25 and 558.28 is: 833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.72 : 925.25 = 558.28 : x
  2. Step 2: Convert to fraction form
    619.72/925.25 = 558.28/x
  3. Step 3: Cross multiply
    619.72x = 925.25 × 558.28
  4. Step 4: Simplify right side
    619.72x = 516,548.57
  5. Step 5: Solve for x
    x = 516,548.57/619.72
  6. Step 6: Final answer
    x = 833.52

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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.