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Finding the Fourth Proportional to 612.72, 916.80 and 377.62

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Solution

The fourth proportional to 612.72, 916.80 and 377.62 is: 565.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.72 : 916.80 = 377.62 : x
  2. Step 2: Convert to fraction form
    612.72/916.80 = 377.62/x
  3. Step 3: Cross multiply
    612.72x = 916.80 × 377.62
  4. Step 4: Simplify right side
    612.72x = 346,202.02
  5. Step 5: Solve for x
    x = 346,202.02/612.72
  6. Step 6: Final answer
    x = 565.02

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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.