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Finding the Fourth Proportional to 7,285.68, 10,928.68 and 2,905.20

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Solution

The fourth proportional to 7,285.68, 10,928.68 and 2,905.20 is: 4,357.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,285.68 : 10,928.68 = 2,905.20 : x
  2. Step 2: Convert to fraction form
    7,285.68/10,928.68 = 2,905.20/x
  3. Step 3: Cross multiply
    7,285.68x = 10,928.68 × 2,905.20
  4. Step 4: Simplify right side
    7,285.68x = 31,750,001.14
  5. Step 5: Solve for x
    x = 31,750,001.14/7,285.68
  6. Step 6: Final answer
    x = 4,357.86

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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.