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Finding the Fourth Proportional to 4,748.62, 7,121.97 and 1,285.06

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Solution

The fourth proportional to 4,748.62, 7,121.97 and 1,285.06 is: 1,927.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,748.62 : 7,121.97 = 1,285.06 : x
  2. Step 2: Convert to fraction form
    4,748.62/7,121.97 = 1,285.06/x
  3. Step 3: Cross multiply
    4,748.62x = 7,121.97 × 1,285.06
  4. Step 4: Simplify right side
    4,748.62x = 9,152,158.77
  5. Step 5: Solve for x
    x = 9,152,158.77/4,748.62
  6. Step 6: Final answer
    x = 1,927.33

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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.