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Finding the Fourth Proportional to 1,051.22, 1,575.69 and 434.60

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Solution

The fourth proportional to 1,051.22, 1,575.69 and 434.60 is: 651.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.22 : 1,575.69 = 434.60 : x
  2. Step 2: Convert to fraction form
    1,051.22/1,575.69 = 434.60/x
  3. Step 3: Cross multiply
    1,051.22x = 1,575.69 × 434.60
  4. Step 4: Simplify right side
    1,051.22x = 684,791.27
  5. Step 5: Solve for x
    x = 684,791.27/1,051.22
  6. Step 6: Final answer
    x = 651.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.