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Finding the Fourth Proportional to 601.31, 900.95 and 427.12

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Solution

The fourth proportional to 601.31, 900.95 and 427.12 is: 639.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.31 : 900.95 = 427.12 : x
  2. Step 2: Convert to fraction form
    601.31/900.95 = 427.12/x
  3. Step 3: Cross multiply
    601.31x = 900.95 × 427.12
  4. Step 4: Simplify right side
    601.31x = 384,809.38
  5. Step 5: Solve for x
    x = 384,809.38/601.31
  6. Step 6: Final answer
    x = 639.95

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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.