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Finding the Fourth Proportional to 487.02, 672.07 and 277.21

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Solution

The fourth proportional to 487.02, 672.07 and 277.21 is: 382.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.02 : 672.07 = 277.21 : x
  2. Step 2: Convert to fraction form
    487.02/672.07 = 277.21/x
  3. Step 3: Cross multiply
    487.02x = 672.07 × 277.21
  4. Step 4: Simplify right side
    487.02x = 186,302.19
  5. Step 5: Solve for x
    x = 186,302.19/487.02
  6. Step 6: Final answer
    x = 382.53

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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.