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Finding the Fourth Proportional to 470.03, 648.15 and 403.88

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Solution

The fourth proportional to 470.03, 648.15 and 403.88 is: 556.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.03 : 648.15 = 403.88 : x
  2. Step 2: Convert to fraction form
    470.03/648.15 = 403.88/x
  3. Step 3: Cross multiply
    470.03x = 648.15 × 403.88
  4. Step 4: Simplify right side
    470.03x = 261,774.82
  5. Step 5: Solve for x
    x = 261,774.82/470.03
  6. Step 6: Final answer
    x = 556.93

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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.