Home / 1,389.67-2,091.47-1,044.79

Finding the Fourth Proportional to 1,389.67, 2,091.47 and 1,044.79

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Solution

The fourth proportional to 1,389.67, 2,091.47 and 1,044.79 is: 1,572.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.67 : 2,091.47 = 1,044.79 : x
  2. Step 2: Convert to fraction form
    1,389.67/2,091.47 = 1,044.79/x
  3. Step 3: Cross multiply
    1,389.67x = 2,091.47 × 1,044.79
  4. Step 4: Simplify right side
    1,389.67x = 2,185,146.94
  5. Step 5: Solve for x
    x = 2,185,146.94/1,389.67
  6. Step 6: Final answer
    x = 1,572.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.