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Finding the Fourth Proportional to 746.39, 1,029.92 and 414.79

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Solution

The fourth proportional to 746.39, 1,029.92 and 414.79 is: 572.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.39 : 1,029.92 = 414.79 : x
  2. Step 2: Convert to fraction form
    746.39/1,029.92 = 414.79/x
  3. Step 3: Cross multiply
    746.39x = 1,029.92 × 414.79
  4. Step 4: Simplify right side
    746.39x = 427,193.29
  5. Step 5: Solve for x
    x = 427,193.29/746.39
  6. Step 6: Final answer
    x = 572.35

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1.5x scale

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.