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Finding the Fourth Proportional to 5,279.61, 7,285.56 and 2,921.61

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Solution

The fourth proportional to 5,279.61, 7,285.56 and 2,921.61 is: 4,031.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.61 : 7,285.56 = 2,921.61 : x
  2. Step 2: Convert to fraction form
    5,279.61/7,285.56 = 2,921.61/x
  3. Step 3: Cross multiply
    5,279.61x = 7,285.56 × 2,921.61
  4. Step 4: Simplify right side
    5,279.61x = 21,285,564.95
  5. Step 5: Solve for x
    x = 21,285,564.95/5,279.61
  6. Step 6: Final answer
    x = 4,031.65

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1.5x scale

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.