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Finding the Fourth Proportional to 487.51, 672.76 and 266.46

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Solution

The fourth proportional to 487.51, 672.76 and 266.46 is: 367.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.51 : 672.76 = 266.46 : x
  2. Step 2: Convert to fraction form
    487.51/672.76 = 266.46/x
  3. Step 3: Cross multiply
    487.51x = 672.76 × 266.46
  4. Step 4: Simplify right side
    487.51x = 179,263.63
  5. Step 5: Solve for x
    x = 179,263.63/487.51
  6. Step 6: Final answer
    x = 367.72

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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.