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Finding the Fourth Proportional to 572.67, 859.01 and 428.09

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Solution

The fourth proportional to 572.67, 859.01 and 428.09 is: 642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.67 : 859.01 = 428.09 : x
  2. Step 2: Convert to fraction form
    572.67/859.01 = 428.09/x
  3. Step 3: Cross multiply
    572.67x = 859.01 × 428.09
  4. Step 4: Simplify right side
    572.67x = 367,727.16
  5. Step 5: Solve for x
    x = 367,727.16/572.67
  6. Step 6: Final answer
    x = 642.13

Related Problems

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.