Home / 1,215.13-1,822.70-484.89

Finding the Fourth Proportional to 1,215.13, 1,822.70 and 484.89

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Solution

The fourth proportional to 1,215.13, 1,822.70 and 484.89 is: 727.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.13 : 1,822.70 = 484.89 : x
  2. Step 2: Convert to fraction form
    1,215.13/1,822.70 = 484.89/x
  3. Step 3: Cross multiply
    1,215.13x = 1,822.70 × 484.89
  4. Step 4: Simplify right side
    1,215.13x = 883,809.00
  5. Step 5: Solve for x
    x = 883,809.00/1,215.13
  6. Step 6: Final answer
    x = 727.34

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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.