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Finding the Fourth Proportional to 1,483.76, 2,226.22 and 790.40

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Solution

The fourth proportional to 1,483.76, 2,226.22 and 790.40 is: 1,185.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,483.76 : 2,226.22 = 790.40 : x
  2. Step 2: Convert to fraction form
    1,483.76/2,226.22 = 790.40/x
  3. Step 3: Cross multiply
    1,483.76x = 2,226.22 × 790.40
  4. Step 4: Simplify right side
    1,483.76x = 1,759,604.29
  5. Step 5: Solve for x
    x = 1,759,604.29/1,483.76
  6. Step 6: Final answer
    x = 1,185.91

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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.