Home / 1,215.40-1,823.10-1,039.23

Finding the Fourth Proportional to 1,215.40, 1,823.10 and 1,039.23

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Solution

The fourth proportional to 1,215.40, 1,823.10 and 1,039.23 is: 1,558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.40 : 1,823.10 = 1,039.23 : x
  2. Step 2: Convert to fraction form
    1,215.40/1,823.10 = 1,039.23/x
  3. Step 3: Cross multiply
    1,215.40x = 1,823.10 × 1,039.23
  4. Step 4: Simplify right side
    1,215.40x = 1,894,620.21
  5. Step 5: Solve for x
    x = 1,894,620.21/1,215.40
  6. Step 6: Final answer
    x = 1,558.85

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Similar ratio
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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.