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Finding the Fourth Proportional to 2,665.47, 4,000.25 and 1,205.65

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Solution

The fourth proportional to 2,665.47, 4,000.25 and 1,205.65 is: 1,809.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,665.47 : 4,000.25 = 1,205.65 : x
  2. Step 2: Convert to fraction form
    2,665.47/4,000.25 = 1,205.65/x
  3. Step 3: Cross multiply
    2,665.47x = 4,000.25 × 1,205.65
  4. Step 4: Simplify right side
    2,665.47x = 4,822,901.41
  5. Step 5: Solve for x
    x = 4,822,901.41/2,665.47
  6. Step 6: Final answer
    x = 1,809.40

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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.