Home / 1,135.86-1,561.55-1,128.84

Finding the Fourth Proportional to 1,135.86, 1,561.55 and 1,128.84

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Solution

The fourth proportional to 1,135.86, 1,561.55 and 1,128.84 is: 1,551.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.86 : 1,561.55 = 1,128.84 : x
  2. Step 2: Convert to fraction form
    1,135.86/1,561.55 = 1,128.84/x
  3. Step 3: Cross multiply
    1,135.86x = 1,561.55 × 1,128.84
  4. Step 4: Simplify right side
    1,135.86x = 1,762,734.46
  5. Step 5: Solve for x
    x = 1,762,734.46/1,135.86
  6. Step 6: Final answer
    x = 1,551.89

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.