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Finding the Fourth Proportional to 601.95, 902.88 and 428.79

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Solution

The fourth proportional to 601.95, 902.88 and 428.79 is: 643.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    601.95 : 902.88 = 428.79 : x
  2. Step 2: Convert to fraction form
    601.95/902.88 = 428.79/x
  3. Step 3: Cross multiply
    601.95x = 902.88 × 428.79
  4. Step 4: Simplify right side
    601.95x = 387,145.92
  5. Step 5: Solve for x
    x = 387,145.92/601.95
  6. Step 6: Final answer
    x = 643.15

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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.