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Finding the Fourth Proportional to 1,777.76, 2,666.68 and 1,412.80

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Solution

The fourth proportional to 1,777.76, 2,666.68 and 1,412.80 is: 2,119.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.76 : 2,666.68 = 1,412.80 : x
  2. Step 2: Convert to fraction form
    1,777.76/2,666.68 = 1,412.80/x
  3. Step 3: Cross multiply
    1,777.76x = 2,666.68 × 1,412.80
  4. Step 4: Simplify right side
    1,777.76x = 3,767,485.50
  5. Step 5: Solve for x
    x = 3,767,485.50/1,777.76
  6. Step 6: Final answer
    x = 2,119.23

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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.