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Finding the Fourth Proportional to 1,520.64, 2,280.51 and 654.75

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Solution

The fourth proportional to 1,520.64, 2,280.51 and 654.75 is: 981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.64 : 2,280.51 = 654.75 : x
  2. Step 2: Convert to fraction form
    1,520.64/2,280.51 = 654.75/x
  3. Step 3: Cross multiply
    1,520.64x = 2,280.51 × 654.75
  4. Step 4: Simplify right side
    1,520.64x = 1,493,163.92
  5. Step 5: Solve for x
    x = 1,493,163.92/1,520.64
  6. Step 6: Final answer
    x = 981.93

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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.