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Finding the Fourth Proportional to 746.97, 1,030.79 and 415.38

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Solution

The fourth proportional to 746.97, 1,030.79 and 415.38 is: 573.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.97 : 1,030.79 = 415.38 : x
  2. Step 2: Convert to fraction form
    746.97/1,030.79 = 415.38/x
  3. Step 3: Cross multiply
    746.97x = 1,030.79 × 415.38
  4. Step 4: Simplify right side
    746.97x = 428,169.55
  5. Step 5: Solve for x
    x = 428,169.55/746.97
  6. Step 6: Final answer
    x = 573.21

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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.