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Finding the Fourth Proportional to 416.48, 574.98 and 339.80

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Solution

The fourth proportional to 416.48, 574.98 and 339.80 is: 469.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.48 : 574.98 = 339.80 : x
  2. Step 2: Convert to fraction form
    416.48/574.98 = 339.80/x
  3. Step 3: Cross multiply
    416.48x = 574.98 × 339.80
  4. Step 4: Simplify right side
    416.48x = 195,378.20
  5. Step 5: Solve for x
    x = 195,378.20/416.48
  6. Step 6: Final answer
    x = 469.12

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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.