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Finding the Fourth Proportional to 746.26, 1,029.90 and 431.63

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Solution

The fourth proportional to 746.26, 1,029.90 and 431.63 is: 595.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.26 : 1,029.90 = 431.63 : x
  2. Step 2: Convert to fraction form
    746.26/1,029.90 = 431.63/x
  3. Step 3: Cross multiply
    746.26x = 1,029.90 × 431.63
  4. Step 4: Simplify right side
    746.26x = 444,538.31
  5. Step 5: Solve for x
    x = 444,538.31/746.26
  6. Step 6: Final answer
    x = 595.69

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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.