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Finding the Fourth Proportional to 417.16, 626.01 and 280.36

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Solution

The fourth proportional to 417.16, 626.01 and 280.36 is: 420.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.16 : 626.01 = 280.36 : x
  2. Step 2: Convert to fraction form
    417.16/626.01 = 280.36/x
  3. Step 3: Cross multiply
    417.16x = 626.01 × 280.36
  4. Step 4: Simplify right side
    417.16x = 175,508.16
  5. Step 5: Solve for x
    x = 175,508.16/417.16
  6. Step 6: Final answer
    x = 420.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.