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Finding the Fourth Proportional to 745.53, 1,026.90 and 627.36

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Solution

The fourth proportional to 745.53, 1,026.90 and 627.36 is: 864.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.53 : 1,026.90 = 627.36 : x
  2. Step 2: Convert to fraction form
    745.53/1,026.90 = 627.36/x
  3. Step 3: Cross multiply
    745.53x = 1,026.90 × 627.36
  4. Step 4: Simplify right side
    745.53x = 644,235.98
  5. Step 5: Solve for x
    x = 644,235.98/745.53
  6. Step 6: Final answer
    x = 864.13

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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.