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Finding the Fourth Proportional to 651.90, 899.69 and 372.17

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Solution

The fourth proportional to 651.90, 899.69 and 372.17 is: 513.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.90 : 899.69 = 372.17 : x
  2. Step 2: Convert to fraction form
    651.90/899.69 = 372.17/x
  3. Step 3: Cross multiply
    651.90x = 899.69 × 372.17
  4. Step 4: Simplify right side
    651.90x = 334,842.00
  5. Step 5: Solve for x
    x = 334,842.00/651.90
  6. Step 6: Final answer
    x = 513.64

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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.