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Finding the Fourth Proportional to 612.24, 916.80 and 338.03

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Solution

The fourth proportional to 612.24, 916.80 and 338.03 is: 506.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.24 : 916.80 = 338.03 : x
  2. Step 2: Convert to fraction form
    612.24/916.80 = 338.03/x
  3. Step 3: Cross multiply
    612.24x = 916.80 × 338.03
  4. Step 4: Simplify right side
    612.24x = 309,905.90
  5. Step 5: Solve for x
    x = 309,905.90/612.24
  6. Step 6: Final answer
    x = 506.18

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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.