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Finding the Fourth Proportional to 746.87, 1,030.71 and 415.29

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Solution

The fourth proportional to 746.87, 1,030.71 and 415.29 is: 573.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.87 : 1,030.71 = 415.29 : x
  2. Step 2: Convert to fraction form
    746.87/1,030.71 = 415.29/x
  3. Step 3: Cross multiply
    746.87x = 1,030.71 × 415.29
  4. Step 4: Simplify right side
    746.87x = 428,048.98
  5. Step 5: Solve for x
    x = 428,048.98/746.87
  6. Step 6: Final answer
    x = 573.13

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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.