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Finding the Fourth Proportional to 619.77, 925.47 and 494.64

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Solution

The fourth proportional to 619.77, 925.47 and 494.64 is: 738.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.77 : 925.47 = 494.64 : x
  2. Step 2: Convert to fraction form
    619.77/925.47 = 494.64/x
  3. Step 3: Cross multiply
    619.77x = 925.47 × 494.64
  4. Step 4: Simplify right side
    619.77x = 457,774.48
  5. Step 5: Solve for x
    x = 457,774.48/619.77
  6. Step 6: Final answer
    x = 738.62

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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.