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Finding the Fourth Proportional to 1,074.09, 1,478.70 and 837.71

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Solution

The fourth proportional to 1,074.09, 1,478.70 and 837.71 is: 1,153.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.09 : 1,478.70 = 837.71 : x
  2. Step 2: Convert to fraction form
    1,074.09/1,478.70 = 837.71/x
  3. Step 3: Cross multiply
    1,074.09x = 1,478.70 × 837.71
  4. Step 4: Simplify right side
    1,074.09x = 1,238,714.38
  5. Step 5: Solve for x
    x = 1,238,714.38/1,074.09
  6. Step 6: Final answer
    x = 1,153.27

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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.