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Finding the Fourth Proportional to 1,776.81, 2,666.58 and 803.60

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Solution

The fourth proportional to 1,776.81, 2,666.58 and 803.60 is: 1,206.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.81 : 2,666.58 = 803.60 : x
  2. Step 2: Convert to fraction form
    1,776.81/2,666.58 = 803.60/x
  3. Step 3: Cross multiply
    1,776.81x = 2,666.58 × 803.60
  4. Step 4: Simplify right side
    1,776.81x = 2,142,863.69
  5. Step 5: Solve for x
    x = 2,142,863.69/1,776.81
  6. Step 6: Final answer
    x = 1,206.02

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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.