Home / 1,541.92-2,129-1,209.77

Finding the Fourth Proportional to 1,541.92, 2,129 and 1,209.77

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Solution

The fourth proportional to 1,541.92, 2,129 and 1,209.77 is: 1,670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.92 : 2,129 = 1,209.77 : x
  2. Step 2: Convert to fraction form
    1,541.92/2,129 = 1,209.77/x
  3. Step 3: Cross multiply
    1,541.92x = 2,129 × 1,209.77
  4. Step 4: Simplify right side
    1,541.92x = 2,575,600.33
  5. Step 5: Solve for x
    x = 2,575,600.33/1,541.92
  6. Step 6: Final answer
    x = 1,670.39

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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.