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Finding the Fourth Proportional to 487.01, 672.06 and 290.54

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Solution

The fourth proportional to 487.01, 672.06 and 290.54 is: 400.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.01 : 672.06 = 290.54 : x
  2. Step 2: Convert to fraction form
    487.01/672.06 = 290.54/x
  3. Step 3: Cross multiply
    487.01x = 672.06 × 290.54
  4. Step 4: Simplify right side
    487.01x = 195,260.31
  5. Step 5: Solve for x
    x = 195,260.31/487.01
  6. Step 6: Final answer
    x = 400.94

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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.