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Finding the Fourth Proportional to 745.69, 1,028.01 and 483.25

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Solution

The fourth proportional to 745.69, 1,028.01 and 483.25 is: 666.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.69 : 1,028.01 = 483.25 : x
  2. Step 2: Convert to fraction form
    745.69/1,028.01 = 483.25/x
  3. Step 3: Cross multiply
    745.69x = 1,028.01 × 483.25
  4. Step 4: Simplify right side
    745.69x = 496,785.83
  5. Step 5: Solve for x
    x = 496,785.83/745.69
  6. Step 6: Final answer
    x = 666.21

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Double scale
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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.