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Finding the Fourth Proportional to 612.09, 915.98 and 474.26

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Solution

The fourth proportional to 612.09, 915.98 and 474.26 is: 709.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.09 : 915.98 = 474.26 : x
  2. Step 2: Convert to fraction form
    612.09/915.98 = 474.26/x
  3. Step 3: Cross multiply
    612.09x = 915.98 × 474.26
  4. Step 4: Simplify right side
    612.09x = 434,405.72
  5. Step 5: Solve for x
    x = 434,405.72/612.09
  6. Step 6: Final answer
    x = 709.71

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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.