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Finding the Fourth Proportional to 638.04, 882.12 and 443.01

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Solution

The fourth proportional to 638.04, 882.12 and 443.01 is: 612.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.04 : 882.12 = 443.01 : x
  2. Step 2: Convert to fraction form
    638.04/882.12 = 443.01/x
  3. Step 3: Cross multiply
    638.04x = 882.12 × 443.01
  4. Step 4: Simplify right side
    638.04x = 390,787.98
  5. Step 5: Solve for x
    x = 390,787.98/638.04
  6. Step 6: Final answer
    x = 612.48

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Half scale
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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.