Home / 1,561.09-2,154.64-1,064.91

Finding the Fourth Proportional to 1,561.09, 2,154.64 and 1,064.91

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Solution

The fourth proportional to 1,561.09, 2,154.64 and 1,064.91 is: 1,469.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.09 : 2,154.64 = 1,064.91 : x
  2. Step 2: Convert to fraction form
    1,561.09/2,154.64 = 1,064.91/x
  3. Step 3: Cross multiply
    1,561.09x = 2,154.64 × 1,064.91
  4. Step 4: Simplify right side
    1,561.09x = 2,294,497.68
  5. Step 5: Solve for x
    x = 2,294,497.68/1,561.09
  6. Step 6: Final answer
    x = 1,469.80

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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.