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Finding the Fourth Proportional to 417.50, 574.29 and 400.65

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Solution

The fourth proportional to 417.50, 574.29 and 400.65 is: 551.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.50 : 574.29 = 400.65 : x
  2. Step 2: Convert to fraction form
    417.50/574.29 = 400.65/x
  3. Step 3: Cross multiply
    417.50x = 574.29 × 400.65
  4. Step 4: Simplify right side
    417.50x = 230,087.13
  5. Step 5: Solve for x
    x = 230,087.13/417.50
  6. Step 6: Final answer
    x = 551.10

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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.