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Finding the Fourth Proportional to 1,670.63, 2,506.55 and 805.55

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Solution

The fourth proportional to 1,670.63, 2,506.55 and 805.55 is: 1,208.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670.63 : 2,506.55 = 805.55 : x
  2. Step 2: Convert to fraction form
    1,670.63/2,506.55 = 805.55/x
  3. Step 3: Cross multiply
    1,670.63x = 2,506.55 × 805.55
  4. Step 4: Simplify right side
    1,670.63x = 2,019,134.79
  5. Step 5: Solve for x
    x = 2,019,134.79/1,670.63
  6. Step 6: Final answer
    x = 1,208.61

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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.