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Finding the Fourth Proportional to 2,358.08, 3,534.60 and 818.72

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Solution

The fourth proportional to 2,358.08, 3,534.60 and 818.72 is: 1,227.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,358.08 : 3,534.60 = 818.72 : x
  2. Step 2: Convert to fraction form
    2,358.08/3,534.60 = 818.72/x
  3. Step 3: Cross multiply
    2,358.08x = 3,534.60 × 818.72
  4. Step 4: Simplify right side
    2,358.08x = 2,893,847.71
  5. Step 5: Solve for x
    x = 2,893,847.71/2,358.08
  6. Step 6: Final answer
    x = 1,227.21

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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.