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Finding the Fourth Proportional to 651.96, 899.73 and 357.21

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Solution

The fourth proportional to 651.96, 899.73 and 357.21 is: 492.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.96 : 899.73 = 357.21 : x
  2. Step 2: Convert to fraction form
    651.96/899.73 = 357.21/x
  3. Step 3: Cross multiply
    651.96x = 899.73 × 357.21
  4. Step 4: Simplify right side
    651.96x = 321,392.55
  5. Step 5: Solve for x
    x = 321,392.55/651.96
  6. Step 6: Final answer
    x = 492.96

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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.