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Finding the Fourth Proportional to 377.72, 520.80 and 307.63

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Solution

The fourth proportional to 377.72, 520.80 and 307.63 is: 424.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.72 : 520.80 = 307.63 : x
  2. Step 2: Convert to fraction form
    377.72/520.80 = 307.63/x
  3. Step 3: Cross multiply
    377.72x = 520.80 × 307.63
  4. Step 4: Simplify right side
    377.72x = 160,213.20
  5. Step 5: Solve for x
    x = 160,213.20/377.72
  6. Step 6: Final answer
    x = 424.16

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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.