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Finding the Fourth Proportional to 937.66, 1,400.20 and 890.28

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Solution

The fourth proportional to 937.66, 1,400.20 and 890.28 is: 1,329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.66 : 1,400.20 = 890.28 : x
  2. Step 2: Convert to fraction form
    937.66/1,400.20 = 890.28/x
  3. Step 3: Cross multiply
    937.66x = 1,400.20 × 890.28
  4. Step 4: Simplify right side
    937.66x = 1,246,570.06
  5. Step 5: Solve for x
    x = 1,246,570.06/937.66
  6. Step 6: Final answer
    x = 1,329.45

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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.