Home / 1,989.18-2,983.95-528.39

Finding the Fourth Proportional to 1,989.18, 2,983.95 and 528.39

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Solution

The fourth proportional to 1,989.18, 2,983.95 and 528.39 is: 792.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.18 : 2,983.95 = 528.39 : x
  2. Step 2: Convert to fraction form
    1,989.18/2,983.95 = 528.39/x
  3. Step 3: Cross multiply
    1,989.18x = 2,983.95 × 528.39
  4. Step 4: Simplify right side
    1,989.18x = 1,576,689.34
  5. Step 5: Solve for x
    x = 1,576,689.34/1,989.18
  6. Step 6: Final answer
    x = 792.63

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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.