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Finding the Fourth Proportional to 486.99, 672.02 and 277.16

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Solution

The fourth proportional to 486.99, 672.02 and 277.16 is: 382.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.99 : 672.02 = 277.16 : x
  2. Step 2: Convert to fraction form
    486.99/672.02 = 277.16/x
  3. Step 3: Cross multiply
    486.99x = 672.02 × 277.16
  4. Step 4: Simplify right side
    486.99x = 186,252.32
  5. Step 5: Solve for x
    x = 186,252.32/486.99
  6. Step 6: Final answer
    x = 382.46

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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.