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Finding the Fourth Proportional to 2,666.40, 4,000.80 and 1,368.76

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Solution

The fourth proportional to 2,666.40, 4,000.80 and 1,368.76 is: 2,053.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.40 : 4,000.80 = 1,368.76 : x
  2. Step 2: Convert to fraction form
    2,666.40/4,000.80 = 1,368.76/x
  3. Step 3: Cross multiply
    2,666.40x = 4,000.80 × 1,368.76
  4. Step 4: Simplify right side
    2,666.40x = 5,476,135.01
  5. Step 5: Solve for x
    x = 5,476,135.01/2,666.40
  6. Step 6: Final answer
    x = 2,053.76

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1.5x scale

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.