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Finding the Fourth Proportional to 651.26, 899.08 and 455.12

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Solution

The fourth proportional to 651.26, 899.08 and 455.12 is: 628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.26 : 899.08 = 455.12 : x
  2. Step 2: Convert to fraction form
    651.26/899.08 = 455.12/x
  3. Step 3: Cross multiply
    651.26x = 899.08 × 455.12
  4. Step 4: Simplify right side
    651.26x = 409,189.29
  5. Step 5: Solve for x
    x = 409,189.29/651.26
  6. Step 6: Final answer
    x = 628.30

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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.