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Finding the Fourth Proportional to 918.14, 1,266.19 and 603.28

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Solution

The fourth proportional to 918.14, 1,266.19 and 603.28 is: 831.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.14 : 1,266.19 = 603.28 : x
  2. Step 2: Convert to fraction form
    918.14/1,266.19 = 603.28/x
  3. Step 3: Cross multiply
    918.14x = 1,266.19 × 603.28
  4. Step 4: Simplify right side
    918.14x = 763,860.77
  5. Step 5: Solve for x
    x = 763,860.77/918.14
  6. Step 6: Final answer
    x = 831.97

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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.