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Finding the Fourth Proportional to 1,266.13, 1,900.06 and 777.69

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Solution

The fourth proportional to 1,266.13, 1,900.06 and 777.69 is: 1,167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.13 : 1,900.06 = 777.69 : x
  2. Step 2: Convert to fraction form
    1,266.13/1,900.06 = 777.69/x
  3. Step 3: Cross multiply
    1,266.13x = 1,900.06 × 777.69
  4. Step 4: Simplify right side
    1,266.13x = 1,477,657.66
  5. Step 5: Solve for x
    x = 1,477,657.66/1,266.13
  6. Step 6: Final answer
    x = 1,167.07

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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.