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Finding the Fourth Proportional to 487.76, 672.57 and 376.99

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Solution

The fourth proportional to 487.76, 672.57 and 376.99 is: 519.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.76 : 672.57 = 376.99 : x
  2. Step 2: Convert to fraction form
    487.76/672.57 = 376.99/x
  3. Step 3: Cross multiply
    487.76x = 672.57 × 376.99
  4. Step 4: Simplify right side
    487.76x = 253,550.48
  5. Step 5: Solve for x
    x = 253,550.48/487.76
  6. Step 6: Final answer
    x = 519.83

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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.