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Finding the Fourth Proportional to 620.68, 855.86 and 508.52

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Solution

The fourth proportional to 620.68, 855.86 and 508.52 is: 701.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.68 : 855.86 = 508.52 : x
  2. Step 2: Convert to fraction form
    620.68/855.86 = 508.52/x
  3. Step 3: Cross multiply
    620.68x = 855.86 × 508.52
  4. Step 4: Simplify right side
    620.68x = 435,221.93
  5. Step 5: Solve for x
    x = 435,221.93/620.68
  6. Step 6: Final answer
    x = 701.20

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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.