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Finding the Fourth Proportional to 572.93, 859.40 and 140.09

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Solution

The fourth proportional to 572.93, 859.40 and 140.09 is: 210.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.93 : 859.40 = 140.09 : x
  2. Step 2: Convert to fraction form
    572.93/859.40 = 140.09/x
  3. Step 3: Cross multiply
    572.93x = 859.40 × 140.09
  4. Step 4: Simplify right side
    572.93x = 120,393.35
  5. Step 5: Solve for x
    x = 120,393.35/572.93
  6. Step 6: Final answer
    x = 210.14

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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.