Home / 1,989.60-2,981.84-1,531.36

Finding the Fourth Proportional to 1,989.60, 2,981.84 and 1,531.36

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Solution

The fourth proportional to 1,989.60, 2,981.84 and 1,531.36 is: 2,295.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.60 : 2,981.84 = 1,531.36 : x
  2. Step 2: Convert to fraction form
    1,989.60/2,981.84 = 1,531.36/x
  3. Step 3: Cross multiply
    1,989.60x = 2,981.84 × 1,531.36
  4. Step 4: Simplify right side
    1,989.60x = 4,566,270.50
  5. Step 5: Solve for x
    x = 4,566,270.50/1,989.60
  6. Step 6: Final answer
    x = 2,295.07

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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.