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Finding the Fourth Proportional to 468.15, 645.89 and 357.45

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Solution

The fourth proportional to 468.15, 645.89 and 357.45 is: 493.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.15 : 645.89 = 357.45 : x
  2. Step 2: Convert to fraction form
    468.15/645.89 = 357.45/x
  3. Step 3: Cross multiply
    468.15x = 645.89 × 357.45
  4. Step 4: Simplify right side
    468.15x = 230,871.59
  5. Step 5: Solve for x
    x = 230,871.59/468.15
  6. Step 6: Final answer
    x = 493.16

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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.