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Finding the Fourth Proportional to 2,376.77, 3,565.15 and 645.39

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Solution

The fourth proportional to 2,376.77, 3,565.15 and 645.39 is: 968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,376.77 : 3,565.15 = 645.39 : x
  2. Step 2: Convert to fraction form
    2,376.77/3,565.15 = 645.39/x
  3. Step 3: Cross multiply
    2,376.77x = 3,565.15 × 645.39
  4. Step 4: Simplify right side
    2,376.77x = 2,300,912.16
  5. Step 5: Solve for x
    x = 2,300,912.16/2,376.77
  6. Step 6: Final answer
    x = 968.08

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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.