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Finding the Fourth Proportional to 620.33, 855.48 and 463.35

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Solution

The fourth proportional to 620.33, 855.48 and 463.35 is: 638.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.33 : 855.48 = 463.35 : x
  2. Step 2: Convert to fraction form
    620.33/855.48 = 463.35/x
  3. Step 3: Cross multiply
    620.33x = 855.48 × 463.35
  4. Step 4: Simplify right side
    620.33x = 396,386.66
  5. Step 5: Solve for x
    x = 396,386.66/620.33
  6. Step 6: Final answer
    x = 638.99

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1.5x scale

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.