Home / 1,215.15-1,821.10-484.32

Finding the Fourth Proportional to 1,215.15, 1,821.10 and 484.32

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Solution

The fourth proportional to 1,215.15, 1,821.10 and 484.32 is: 725.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.15 : 1,821.10 = 484.32 : x
  2. Step 2: Convert to fraction form
    1,215.15/1,821.10 = 484.32/x
  3. Step 3: Cross multiply
    1,215.15x = 1,821.10 × 484.32
  4. Step 4: Simplify right side
    1,215.15x = 881,995.15
  5. Step 5: Solve for x
    x = 881,995.15/1,215.15
  6. Step 6: Final answer
    x = 725.83

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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.