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Finding the Fourth Proportional to 487.25, 672.40 and 266.19

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Solution

The fourth proportional to 487.25, 672.40 and 266.19 is: 367.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.25 : 672.40 = 266.19 : x
  2. Step 2: Convert to fraction form
    487.25/672.40 = 266.19/x
  3. Step 3: Cross multiply
    487.25x = 672.40 × 266.19
  4. Step 4: Simplify right side
    487.25x = 178,986.16
  5. Step 5: Solve for x
    x = 178,986.16/487.25
  6. Step 6: Final answer
    x = 367.34

Related Problems

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Double scale
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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.