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Finding the Fourth Proportional to 607.06, 912.30 and 415.90

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Solution

The fourth proportional to 607.06, 912.30 and 415.90 is: 625.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.06 : 912.30 = 415.90 : x
  2. Step 2: Convert to fraction form
    607.06/912.30 = 415.90/x
  3. Step 3: Cross multiply
    607.06x = 912.30 × 415.90
  4. Step 4: Simplify right side
    607.06x = 379,425.57
  5. Step 5: Solve for x
    x = 379,425.57/607.06
  6. Step 6: Final answer
    x = 625.02

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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.