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Finding the Fourth Proportional to 607.79, 838.94 and 474.61

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Solution

The fourth proportional to 607.79, 838.94 and 474.61 is: 655.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.79 : 838.94 = 474.61 : x
  2. Step 2: Convert to fraction form
    607.79/838.94 = 474.61/x
  3. Step 3: Cross multiply
    607.79x = 838.94 × 474.61
  4. Step 4: Simplify right side
    607.79x = 398,169.31
  5. Step 5: Solve for x
    x = 398,169.31/607.79
  6. Step 6: Final answer
    x = 655.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.