Home / 1,296.99-1,936.70-1,129.32

Finding the Fourth Proportional to 1,296.99, 1,936.70 and 1,129.32

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Solution

The fourth proportional to 1,296.99, 1,936.70 and 1,129.32 is: 1,686.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.99 : 1,936.70 = 1,129.32 : x
  2. Step 2: Convert to fraction form
    1,296.99/1,936.70 = 1,129.32/x
  3. Step 3: Cross multiply
    1,296.99x = 1,936.70 × 1,129.32
  4. Step 4: Simplify right side
    1,296.99x = 2,187,148.40
  5. Step 5: Solve for x
    x = 2,187,148.40/1,296.99
  6. Step 6: Final answer
    x = 1,686.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.