Home / 1,967.79-2,715.44-1,128.63

Finding the Fourth Proportional to 1,967.79, 2,715.44 and 1,128.63

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Solution

The fourth proportional to 1,967.79, 2,715.44 and 1,128.63 is: 1,557.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,967.79 : 2,715.44 = 1,128.63 : x
  2. Step 2: Convert to fraction form
    1,967.79/2,715.44 = 1,128.63/x
  3. Step 3: Cross multiply
    1,967.79x = 2,715.44 × 1,128.63
  4. Step 4: Simplify right side
    1,967.79x = 3,064,721.40
  5. Step 5: Solve for x
    x = 3,064,721.40/1,967.79
  6. Step 6: Final answer
    x = 1,557.44

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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.