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Finding the Fourth Proportional to 1,376.60, 2,065.56 and 683.33

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Solution

The fourth proportional to 1,376.60, 2,065.56 and 683.33 is: 1,025.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.60 : 2,065.56 = 683.33 : x
  2. Step 2: Convert to fraction form
    1,376.60/2,065.56 = 683.33/x
  3. Step 3: Cross multiply
    1,376.60x = 2,065.56 × 683.33
  4. Step 4: Simplify right side
    1,376.60x = 1,411,459.11
  5. Step 5: Solve for x
    x = 1,411,459.11/1,376.60
  6. Step 6: Final answer
    x = 1,025.32

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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.