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Finding the Fourth Proportional to 417.72, 623.70 and 356.82

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Solution

The fourth proportional to 417.72, 623.70 and 356.82 is: 532.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.72 : 623.70 = 356.82 : x
  2. Step 2: Convert to fraction form
    417.72/623.70 = 356.82/x
  3. Step 3: Cross multiply
    417.72x = 623.70 × 356.82
  4. Step 4: Simplify right side
    417.72x = 222,548.63
  5. Step 5: Solve for x
    x = 222,548.63/417.72
  6. Step 6: Final answer
    x = 532.77

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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.