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Finding the Fourth Proportional to 2,415.79, 3,622.23 and 1,318.63

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Solution

The fourth proportional to 2,415.79, 3,622.23 and 1,318.63 is: 1,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.79 : 3,622.23 = 1,318.63 : x
  2. Step 2: Convert to fraction form
    2,415.79/3,622.23 = 1,318.63/x
  3. Step 3: Cross multiply
    2,415.79x = 3,622.23 × 1,318.63
  4. Step 4: Simplify right side
    2,415.79x = 4,776,381.14
  5. Step 5: Solve for x
    x = 4,776,381.14/2,415.79
  6. Step 6: Final answer
    x = 1,977.15

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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.