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Finding the Fourth Proportional to 608.20, 853.10 and 608.20

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Solution

The fourth proportional to 608.20, 853.10 and 608.20 is: 853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.20 : 853.10 = 608.20 : x
  2. Step 2: Convert to fraction form
    608.20/853.10 = 608.20/x
  3. Step 3: Cross multiply
    608.20x = 853.10 × 608.20
  4. Step 4: Simplify right side
    608.20x = 518,855.42
  5. Step 5: Solve for x
    x = 518,855.42/608.20
  6. Step 6: Final answer
    x = 853.10

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.