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Finding the Fourth Proportional to 619.74, 854.01 and 479.97

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Solution

The fourth proportional to 619.74, 854.01 and 479.97 is: 661.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.74 : 854.01 = 479.97 : x
  2. Step 2: Convert to fraction form
    619.74/854.01 = 479.97/x
  3. Step 3: Cross multiply
    619.74x = 854.01 × 479.97
  4. Step 4: Simplify right side
    619.74x = 409,899.18
  5. Step 5: Solve for x
    x = 409,899.18/619.74
  6. Step 6: Final answer
    x = 661.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.