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Finding the Fourth Proportional to 572.46, 789.20 and 383.32

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Solution

The fourth proportional to 572.46, 789.20 and 383.32 is: 528.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.46 : 789.20 = 383.32 : x
  2. Step 2: Convert to fraction form
    572.46/789.20 = 383.32/x
  3. Step 3: Cross multiply
    572.46x = 789.20 × 383.32
  4. Step 4: Simplify right side
    572.46x = 302,516.14
  5. Step 5: Solve for x
    x = 302,516.14/572.46
  6. Step 6: Final answer
    x = 528.45

Related Problems

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Double scale
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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.