Home / 1,861.39-2,569.05-1,391.64

Finding the Fourth Proportional to 1,861.39, 2,569.05 and 1,391.64

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Solution

The fourth proportional to 1,861.39, 2,569.05 and 1,391.64 is: 1,920.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.39 : 2,569.05 = 1,391.64 : x
  2. Step 2: Convert to fraction form
    1,861.39/2,569.05 = 1,391.64/x
  3. Step 3: Cross multiply
    1,861.39x = 2,569.05 × 1,391.64
  4. Step 4: Simplify right side
    1,861.39x = 3,575,192.74
  5. Step 5: Solve for x
    x = 3,575,192.74/1,861.39
  6. Step 6: Final answer
    x = 1,920.71

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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.