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Finding the Fourth Proportional to 1,034.61, 1,429.68 and 785.49

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Solution

The fourth proportional to 1,034.61, 1,429.68 and 785.49 is: 1,085.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.61 : 1,429.68 = 785.49 : x
  2. Step 2: Convert to fraction form
    1,034.61/1,429.68 = 785.49/x
  3. Step 3: Cross multiply
    1,034.61x = 1,429.68 × 785.49
  4. Step 4: Simplify right side
    1,034.61x = 1,122,999.34
  5. Step 5: Solve for x
    x = 1,122,999.34/1,034.61
  6. Step 6: Final answer
    x = 1,085.43

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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.