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Finding the Fourth Proportional to 745.90, 1,029.55 and 451.19

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Solution

The fourth proportional to 745.90, 1,029.55 and 451.19 is: 622.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.90 : 1,029.55 = 451.19 : x
  2. Step 2: Convert to fraction form
    745.90/1,029.55 = 451.19/x
  3. Step 3: Cross multiply
    745.90x = 1,029.55 × 451.19
  4. Step 4: Simplify right side
    745.90x = 464,522.66
  5. Step 5: Solve for x
    x = 464,522.66/745.90
  6. Step 6: Final answer
    x = 622.77

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Double scale
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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.