Home / 1,967.77-2,715.51-1,128.43

Finding the Fourth Proportional to 1,967.77, 2,715.51 and 1,128.43

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Solution

The fourth proportional to 1,967.77, 2,715.51 and 1,128.43 is: 1,557.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,967.77 : 2,715.51 = 1,128.43 : x
  2. Step 2: Convert to fraction form
    1,967.77/2,715.51 = 1,128.43/x
  3. Step 3: Cross multiply
    1,967.77x = 2,715.51 × 1,128.43
  4. Step 4: Simplify right side
    1,967.77x = 3,064,262.95
  5. Step 5: Solve for x
    x = 3,064,262.95/1,967.77
  6. Step 6: Final answer
    x = 1,557.23

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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.