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Finding the Fourth Proportional to 745.72, 1,029.43 and 447.10

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Solution

The fourth proportional to 745.72, 1,029.43 and 447.10 is: 617.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.72 : 1,029.43 = 447.10 : x
  2. Step 2: Convert to fraction form
    745.72/1,029.43 = 447.10/x
  3. Step 3: Cross multiply
    745.72x = 1,029.43 × 447.10
  4. Step 4: Simplify right side
    745.72x = 460,258.15
  5. Step 5: Solve for x
    x = 460,258.15/745.72
  6. Step 6: Final answer
    x = 617.20

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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.