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Finding the Fourth Proportional to 1,360.64, 2,040.66 and 666.62

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Solution

The fourth proportional to 1,360.64, 2,040.66 and 666.62 is: 999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.64 : 2,040.66 = 666.62 : x
  2. Step 2: Convert to fraction form
    1,360.64/2,040.66 = 666.62/x
  3. Step 3: Cross multiply
    1,360.64x = 2,040.66 × 666.62
  4. Step 4: Simplify right side
    1,360.64x = 1,360,344.77
  5. Step 5: Solve for x
    x = 1,360,344.77/1,360.64
  6. Step 6: Final answer
    x = 999.78

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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.