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Finding the Fourth Proportional to 745.72, 1,113.58 and 630.29

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Solution

The fourth proportional to 745.72, 1,113.58 and 630.29 is: 941.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.72 : 1,113.58 = 630.29 : x
  2. Step 2: Convert to fraction form
    745.72/1,113.58 = 630.29/x
  3. Step 3: Cross multiply
    745.72x = 1,113.58 × 630.29
  4. Step 4: Simplify right side
    745.72x = 701,878.34
  5. Step 5: Solve for x
    x = 701,878.34/745.72
  6. Step 6: Final answer
    x = 941.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.