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Finding the Fourth Proportional to 1,989.52, 2,984.80 and 1,864.46

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Solution

The fourth proportional to 1,989.52, 2,984.80 and 1,864.46 is: 2,797.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.52 : 2,984.80 = 1,864.46 : x
  2. Step 2: Convert to fraction form
    1,989.52/2,984.80 = 1,864.46/x
  3. Step 3: Cross multiply
    1,989.52x = 2,984.80 × 1,864.46
  4. Step 4: Simplify right side
    1,989.52x = 5,565,025.52
  5. Step 5: Solve for x
    x = 5,565,025.52/1,989.52
  6. Step 6: Final answer
    x = 2,797.16

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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.