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Finding the Fourth Proportional to 487.03, 672.03 and 288.03

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Solution

The fourth proportional to 487.03, 672.03 and 288.03 is: 397.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.03 : 672.03 = 288.03 : x
  2. Step 2: Convert to fraction form
    487.03/672.03 = 288.03/x
  3. Step 3: Cross multiply
    487.03x = 672.03 × 288.03
  4. Step 4: Simplify right side
    487.03x = 193,564.80
  5. Step 5: Solve for x
    x = 193,564.80/487.03
  6. Step 6: Final answer
    x = 397.44

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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.