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Finding the Fourth Proportional to 2,665.61, 4,000.46 and 1,205.79

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Solution

The fourth proportional to 2,665.61, 4,000.46 and 1,205.79 is: 1,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.61 : 4,000.46 = 1,205.79 : x
  2. Step 2: Convert to fraction form
    2,665.61/4,000.46 = 1,205.79/x
  3. Step 3: Cross multiply
    2,665.61x = 4,000.46 × 1,205.79
  4. Step 4: Simplify right side
    2,665.61x = 4,823,693.63
  5. Step 5: Solve for x
    x = 4,823,693.63/2,665.61
  6. Step 6: Final answer
    x = 1,809.60

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1.5x scale

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.