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Finding the Fourth Proportional to 538.37, 805.71 and 417.18

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Solution

The fourth proportional to 538.37, 805.71 and 417.18 is: 624.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.37 : 805.71 = 417.18 : x
  2. Step 2: Convert to fraction form
    538.37/805.71 = 417.18/x
  3. Step 3: Cross multiply
    538.37x = 805.71 × 417.18
  4. Step 4: Simplify right side
    538.37x = 336,126.10
  5. Step 5: Solve for x
    x = 336,126.10/538.37
  6. Step 6: Final answer
    x = 624.34

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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.