Home / 1,776.18-2,666.70-1,129.80

Finding the Fourth Proportional to 1,776.18, 2,666.70 and 1,129.80

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Solution

The fourth proportional to 1,776.18, 2,666.70 and 1,129.80 is: 1,696.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.18 : 2,666.70 = 1,129.80 : x
  2. Step 2: Convert to fraction form
    1,776.18/2,666.70 = 1,129.80/x
  3. Step 3: Cross multiply
    1,776.18x = 2,666.70 × 1,129.80
  4. Step 4: Simplify right side
    1,776.18x = 3,012,837.66
  5. Step 5: Solve for x
    x = 3,012,837.66/1,776.18
  6. Step 6: Final answer
    x = 1,696.25

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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.