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Finding the Fourth Proportional to 1,777.31, 2,666.26 and 790.47

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Solution

The fourth proportional to 1,777.31, 2,666.26 and 790.47 is: 1,185.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.31 : 2,666.26 = 790.47 : x
  2. Step 2: Convert to fraction form
    1,777.31/2,666.26 = 790.47/x
  3. Step 3: Cross multiply
    1,777.31x = 2,666.26 × 790.47
  4. Step 4: Simplify right side
    1,777.31x = 2,107,598.54
  5. Step 5: Solve for x
    x = 2,107,598.54/1,777.31
  6. Step 6: Final answer
    x = 1,185.84

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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.