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Finding the Fourth Proportional to 520.47, 779.01 and 383.46

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Solution

The fourth proportional to 520.47, 779.01 and 383.46 is: 573.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.47 : 779.01 = 383.46 : x
  2. Step 2: Convert to fraction form
    520.47/779.01 = 383.46/x
  3. Step 3: Cross multiply
    520.47x = 779.01 × 383.46
  4. Step 4: Simplify right side
    520.47x = 298,719.17
  5. Step 5: Solve for x
    x = 298,719.17/520.47
  6. Step 6: Final answer
    x = 573.94

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.