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Finding the Fourth Proportional to 641.20, 885.12 and 466.24

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Solution

The fourth proportional to 641.20, 885.12 and 466.24 is: 643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.20 : 885.12 = 466.24 : x
  2. Step 2: Convert to fraction form
    641.20/885.12 = 466.24/x
  3. Step 3: Cross multiply
    641.20x = 885.12 × 466.24
  4. Step 4: Simplify right side
    641.20x = 412,678.35
  5. Step 5: Solve for x
    x = 412,678.35/641.20
  6. Step 6: Final answer
    x = 643.60

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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.