Home / 1,214.15-1,821.34-483.55

Finding the Fourth Proportional to 1,214.15, 1,821.34 and 483.55

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Solution

The fourth proportional to 1,214.15, 1,821.34 and 483.55 is: 725.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.15 : 1,821.34 = 483.55 : x
  2. Step 2: Convert to fraction form
    1,214.15/1,821.34 = 483.55/x
  3. Step 3: Cross multiply
    1,214.15x = 1,821.34 × 483.55
  4. Step 4: Simplify right side
    1,214.15x = 880,708.96
  5. Step 5: Solve for x
    x = 880,708.96/1,214.15
  6. Step 6: Final answer
    x = 725.37

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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.