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Finding the Fourth Proportional to 1,505.86, 2,078.19 and 842.93

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Solution

The fourth proportional to 1,505.86, 2,078.19 and 842.93 is: 1,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.86 : 2,078.19 = 842.93 : x
  2. Step 2: Convert to fraction form
    1,505.86/2,078.19 = 842.93/x
  3. Step 3: Cross multiply
    1,505.86x = 2,078.19 × 842.93
  4. Step 4: Simplify right side
    1,505.86x = 1,751,758.31
  5. Step 5: Solve for x
    x = 1,751,758.31/1,505.86
  6. Step 6: Final answer
    x = 1,163.30

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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.