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Finding the Fourth Proportional to 745.89, 1,030.37 and 709.44

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Solution

The fourth proportional to 745.89, 1,030.37 and 709.44 is: 980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.89 : 1,030.37 = 709.44 : x
  2. Step 2: Convert to fraction form
    745.89/1,030.37 = 709.44/x
  3. Step 3: Cross multiply
    745.89x = 1,030.37 × 709.44
  4. Step 4: Simplify right side
    745.89x = 730,982.15
  5. Step 5: Solve for x
    x = 730,982.15/745.89
  6. Step 6: Final answer
    x = 980.01

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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.