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Finding the Fourth Proportional to 522.31, 779.18 and 436.19

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Solution

The fourth proportional to 522.31, 779.18 and 436.19 is: 650.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.31 : 779.18 = 436.19 : x
  2. Step 2: Convert to fraction form
    522.31/779.18 = 436.19/x
  3. Step 3: Cross multiply
    522.31x = 779.18 × 436.19
  4. Step 4: Simplify right side
    522.31x = 339,870.52
  5. Step 5: Solve for x
    x = 339,870.52/522.31
  6. Step 6: Final answer
    x = 650.71

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.