Home / 1,376.68-2,068.62-1,289.20

Finding the Fourth Proportional to 1,376.68, 2,068.62 and 1,289.20

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Solution

The fourth proportional to 1,376.68, 2,068.62 and 1,289.20 is: 1,937.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.68 : 2,068.62 = 1,289.20 : x
  2. Step 2: Convert to fraction form
    1,376.68/2,068.62 = 1,289.20/x
  3. Step 3: Cross multiply
    1,376.68x = 2,068.62 × 1,289.20
  4. Step 4: Simplify right side
    1,376.68x = 2,666,864.90
  5. Step 5: Solve for x
    x = 2,666,864.90/1,376.68
  6. Step 6: Final answer
    x = 1,937.17

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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.