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Finding the Fourth Proportional to 1,037.34, 1,549.29 and 939.65

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Solution

The fourth proportional to 1,037.34, 1,549.29 and 939.65 is: 1,403.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.34 : 1,549.29 = 939.65 : x
  2. Step 2: Convert to fraction form
    1,037.34/1,549.29 = 939.65/x
  3. Step 3: Cross multiply
    1,037.34x = 1,549.29 × 939.65
  4. Step 4: Simplify right side
    1,037.34x = 1,455,782.60
  5. Step 5: Solve for x
    x = 1,455,782.60/1,037.34
  6. Step 6: Final answer
    x = 1,403.38

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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.