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Finding the Fourth Proportional to 3,356.61, 5,034.45 and 891.63

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Solution

The fourth proportional to 3,356.61, 5,034.45 and 891.63 is: 1,337.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,356.61 : 5,034.45 = 891.63 : x
  2. Step 2: Convert to fraction form
    3,356.61/5,034.45 = 891.63/x
  3. Step 3: Cross multiply
    3,356.61x = 5,034.45 × 891.63
  4. Step 4: Simplify right side
    3,356.61x = 4,488,866.65
  5. Step 5: Solve for x
    x = 4,488,866.65/3,356.61
  6. Step 6: Final answer
    x = 1,337.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.