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Finding the Fourth Proportional to 417.09, 575.45 and 312.52

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Solution

The fourth proportional to 417.09, 575.45 and 312.52 is: 431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.09 : 575.45 = 312.52 : x
  2. Step 2: Convert to fraction form
    417.09/575.45 = 312.52/x
  3. Step 3: Cross multiply
    417.09x = 575.45 × 312.52
  4. Step 4: Simplify right side
    417.09x = 179,841.45
  5. Step 5: Solve for x
    x = 179,841.45/417.09
  6. Step 6: Final answer
    x = 431.18

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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.