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Finding the Fourth Proportional to 620.00, 854.19 and 479.63

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Solution

The fourth proportional to 620.00, 854.19 and 479.63 is: 660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.00 : 854.19 = 479.63 : x
  2. Step 2: Convert to fraction form
    620.00/854.19 = 479.63/x
  3. Step 3: Cross multiply
    620.00x = 854.19 × 479.63
  4. Step 4: Simplify right side
    620.00x = 409,697.29
  5. Step 5: Solve for x
    x = 409,697.29/620.00
  6. Step 6: Final answer
    x = 660.80

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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.