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Finding the Fourth Proportional to 695.04, 1,038.13 and 629.05

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Solution

The fourth proportional to 695.04, 1,038.13 and 629.05 is: 939.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.04 : 1,038.13 = 629.05 : x
  2. Step 2: Convert to fraction form
    695.04/1,038.13 = 629.05/x
  3. Step 3: Cross multiply
    695.04x = 1,038.13 × 629.05
  4. Step 4: Simplify right side
    695.04x = 653,035.68
  5. Step 5: Solve for x
    x = 653,035.68/695.04
  6. Step 6: Final answer
    x = 939.57

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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.