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Finding the Fourth Proportional to 1,376.03, 2,064.69 and 645.50

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Solution

The fourth proportional to 1,376.03, 2,064.69 and 645.50 is: 968.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.03 : 2,064.69 = 645.50 : x
  2. Step 2: Convert to fraction form
    1,376.03/2,064.69 = 645.50/x
  3. Step 3: Cross multiply
    1,376.03x = 2,064.69 × 645.50
  4. Step 4: Simplify right side
    1,376.03x = 1,332,747.07
  5. Step 5: Solve for x
    x = 1,332,747.07/1,376.03
  6. Step 6: Final answer
    x = 968.55

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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.