Home / 2,127.77-2,935.85-1,288.47

Finding the Fourth Proportional to 2,127.77, 2,935.85 and 1,288.47

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Solution

The fourth proportional to 2,127.77, 2,935.85 and 1,288.47 is: 1,777.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.77 : 2,935.85 = 1,288.47 : x
  2. Step 2: Convert to fraction form
    2,127.77/2,935.85 = 1,288.47/x
  3. Step 3: Cross multiply
    2,127.77x = 2,935.85 × 1,288.47
  4. Step 4: Simplify right side
    2,127.77x = 3,782,754.65
  5. Step 5: Solve for x
    x = 3,782,754.65/2,127.77
  6. Step 6: Final answer
    x = 1,777.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.