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Finding the Fourth Proportional to 5,285.76, 7,925.76 and 2,689.92

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Solution

The fourth proportional to 5,285.76, 7,925.76 and 2,689.92 is: 4,033.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.76 : 7,925.76 = 2,689.92 : x
  2. Step 2: Convert to fraction form
    5,285.76/7,925.76 = 2,689.92/x
  3. Step 3: Cross multiply
    5,285.76x = 7,925.76 × 2,689.92
  4. Step 4: Simplify right side
    5,285.76x = 21,319,660.34
  5. Step 5: Solve for x
    x = 21,319,660.34/5,285.76
  6. Step 6: Final answer
    x = 4,033.41

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1.5x scale

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.