Home / 1,296.72-1,931.13-1,240.56

Finding the Fourth Proportional to 1,296.72, 1,931.13 and 1,240.56

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Solution

The fourth proportional to 1,296.72, 1,931.13 and 1,240.56 is: 1,847.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.72 : 1,931.13 = 1,240.56 : x
  2. Step 2: Convert to fraction form
    1,296.72/1,931.13 = 1,240.56/x
  3. Step 3: Cross multiply
    1,296.72x = 1,931.13 × 1,240.56
  4. Step 4: Simplify right side
    1,296.72x = 2,395,682.63
  5. Step 5: Solve for x
    x = 2,395,682.63/1,296.72
  6. Step 6: Final answer
    x = 1,847.49

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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.