Home / 1,989.50-2,984.30-528.69

Finding the Fourth Proportional to 1,989.50, 2,984.30 and 528.69

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Solution

The fourth proportional to 1,989.50, 2,984.30 and 528.69 is: 793.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.50 : 2,984.30 = 528.69 : x
  2. Step 2: Convert to fraction form
    1,989.50/2,984.30 = 528.69/x
  3. Step 3: Cross multiply
    1,989.50x = 2,984.30 × 528.69
  4. Step 4: Simplify right side
    1,989.50x = 1,577,770.89
  5. Step 5: Solve for x
    x = 1,577,770.89/1,989.50
  6. Step 6: Final answer
    x = 793.05

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1.5x scale

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.