Home / 1,989.45-2,984.40-528.62

Finding the Fourth Proportional to 1,989.45, 2,984.40 and 528.62

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Solution

The fourth proportional to 1,989.45, 2,984.40 and 528.62 is: 792.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.45 : 2,984.40 = 528.62 : x
  2. Step 2: Convert to fraction form
    1,989.45/2,984.40 = 528.62/x
  3. Step 3: Cross multiply
    1,989.45x = 2,984.40 × 528.62
  4. Step 4: Simplify right side
    1,989.45x = 1,577,598.61
  5. Step 5: Solve for x
    x = 1,577,598.61/1,989.45
  6. Step 6: Final answer
    x = 792.98

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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.