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Finding the Fourth Proportional to 1,162.13, 1,603.51 and 664.93

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Solution

The fourth proportional to 1,162.13, 1,603.51 and 664.93 is: 917.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.13 : 1,603.51 = 664.93 : x
  2. Step 2: Convert to fraction form
    1,162.13/1,603.51 = 664.93/x
  3. Step 3: Cross multiply
    1,162.13x = 1,603.51 × 664.93
  4. Step 4: Simplify right side
    1,162.13x = 1,066,221.90
  5. Step 5: Solve for x
    x = 1,066,221.90/1,162.13
  6. Step 6: Final answer
    x = 917.47

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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.