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Finding the Fourth Proportional to 651.55, 899.13 and 352.79

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Solution

The fourth proportional to 651.55, 899.13 and 352.79 is: 486.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.55 : 899.13 = 352.79 : x
  2. Step 2: Convert to fraction form
    651.55/899.13 = 352.79/x
  3. Step 3: Cross multiply
    651.55x = 899.13 × 352.79
  4. Step 4: Simplify right side
    651.55x = 317,208.01
  5. Step 5: Solve for x
    x = 317,208.01/651.55
  6. Step 6: Final answer
    x = 486.85

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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.