Home / 1,558.86-2,151.45-961.45

Finding the Fourth Proportional to 1,558.86, 2,151.45 and 961.45

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Solution

The fourth proportional to 1,558.86, 2,151.45 and 961.45 is: 1,326.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.86 : 2,151.45 = 961.45 : x
  2. Step 2: Convert to fraction form
    1,558.86/2,151.45 = 961.45/x
  3. Step 3: Cross multiply
    1,558.86x = 2,151.45 × 961.45
  4. Step 4: Simplify right side
    1,558.86x = 2,068,506.22
  5. Step 5: Solve for x
    x = 2,068,506.22/1,558.86
  6. Step 6: Final answer
    x = 1,326.94

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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.