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Finding the Fourth Proportional to 424.19, 584.94 and 345.80

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Solution

The fourth proportional to 424.19, 584.94 and 345.80 is: 476.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.19 : 584.94 = 345.80 : x
  2. Step 2: Convert to fraction form
    424.19/584.94 = 345.80/x
  3. Step 3: Cross multiply
    424.19x = 584.94 × 345.80
  4. Step 4: Simplify right side
    424.19x = 202,272.25
  5. Step 5: Solve for x
    x = 202,272.25/424.19
  6. Step 6: Final answer
    x = 476.84

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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.