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Finding the Fourth Proportional to 464.96, 640.14 and 403.58

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Solution

The fourth proportional to 464.96, 640.14 and 403.58 is: 555.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.96 : 640.14 = 403.58 : x
  2. Step 2: Convert to fraction form
    464.96/640.14 = 403.58/x
  3. Step 3: Cross multiply
    464.96x = 640.14 × 403.58
  4. Step 4: Simplify right side
    464.96x = 258,347.70
  5. Step 5: Solve for x
    x = 258,347.70/464.96
  6. Step 6: Final answer
    x = 555.63

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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.