Home / 1,296.04-1,939.36-1,115.62

Finding the Fourth Proportional to 1,296.04, 1,939.36 and 1,115.62

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Solution

The fourth proportional to 1,296.04, 1,939.36 and 1,115.62 is: 1,669.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.04 : 1,939.36 = 1,115.62 : x
  2. Step 2: Convert to fraction form
    1,296.04/1,939.36 = 1,115.62/x
  3. Step 3: Cross multiply
    1,296.04x = 1,939.36 × 1,115.62
  4. Step 4: Simplify right side
    1,296.04x = 2,163,588.80
  5. Step 5: Solve for x
    x = 2,163,588.80/1,296.04
  6. Step 6: Final answer
    x = 1,669.38

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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.