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Finding the Fourth Proportional to 1,875.32, 2,813.32 and 779.77

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Solution

The fourth proportional to 1,875.32, 2,813.32 and 779.77 is: 1,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.32 : 2,813.32 = 779.77 : x
  2. Step 2: Convert to fraction form
    1,875.32/2,813.32 = 779.77/x
  3. Step 3: Cross multiply
    1,875.32x = 2,813.32 × 779.77
  4. Step 4: Simplify right side
    1,875.32x = 2,193,742.54
  5. Step 5: Solve for x
    x = 2,193,742.54/1,875.32
  6. Step 6: Final answer
    x = 1,169.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.