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Finding the Fourth Proportional to 1,528.48, 2,292.64 and 878.80

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Solution

The fourth proportional to 1,528.48, 2,292.64 and 878.80 is: 1,318.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.48 : 2,292.64 = 878.80 : x
  2. Step 2: Convert to fraction form
    1,528.48/2,292.64 = 878.80/x
  3. Step 3: Cross multiply
    1,528.48x = 2,292.64 × 878.80
  4. Step 4: Simplify right side
    1,528.48x = 2,014,772.03
  5. Step 5: Solve for x
    x = 2,014,772.03/1,528.48
  6. Step 6: Final answer
    x = 1,318.15

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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.