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Finding the Fourth Proportional to 573.42, 860.12 and 390.36

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Solution

The fourth proportional to 573.42, 860.12 and 390.36 is: 585.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.42 : 860.12 = 390.36 : x
  2. Step 2: Convert to fraction form
    573.42/860.12 = 390.36/x
  3. Step 3: Cross multiply
    573.42x = 860.12 × 390.36
  4. Step 4: Simplify right side
    573.42x = 335,752.14
  5. Step 5: Solve for x
    x = 335,752.14/573.42
  6. Step 6: Final answer
    x = 585.53

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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.