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Finding the Fourth Proportional to 745.41, 1,029.75 and 615.81

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Solution

The fourth proportional to 745.41, 1,029.75 and 615.81 is: 850.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.41 : 1,029.75 = 615.81 : x
  2. Step 2: Convert to fraction form
    745.41/1,029.75 = 615.81/x
  3. Step 3: Cross multiply
    745.41x = 1,029.75 × 615.81
  4. Step 4: Simplify right side
    745.41x = 634,130.35
  5. Step 5: Solve for x
    x = 634,130.35/745.41
  6. Step 6: Final answer
    x = 850.71

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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.