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Finding the Fourth Proportional to 464.74, 641.28 and 290.02

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Solution

The fourth proportional to 464.74, 641.28 and 290.02 is: 400.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.74 : 641.28 = 290.02 : x
  2. Step 2: Convert to fraction form
    464.74/641.28 = 290.02/x
  3. Step 3: Cross multiply
    464.74x = 641.28 × 290.02
  4. Step 4: Simplify right side
    464.74x = 185,984.03
  5. Step 5: Solve for x
    x = 185,984.03/464.74
  6. Step 6: Final answer
    x = 400.19

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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.