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Finding the Fourth Proportional to 643.41, 888.12 and 433.44

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Solution

The fourth proportional to 643.41, 888.12 and 433.44 is: 598.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.41 : 888.12 = 433.44 : x
  2. Step 2: Convert to fraction form
    643.41/888.12 = 433.44/x
  3. Step 3: Cross multiply
    643.41x = 888.12 × 433.44
  4. Step 4: Simplify right side
    643.41x = 384,946.73
  5. Step 5: Solve for x
    x = 384,946.73/643.41
  6. Step 6: Final answer
    x = 598.29

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Double scale
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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.