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Finding the Fourth Proportional to 2,685.71, 4,021.70 and 1,590.86

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Solution

The fourth proportional to 2,685.71, 4,021.70 and 1,590.86 is: 2,382.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.71 : 4,021.70 = 1,590.86 : x
  2. Step 2: Convert to fraction form
    2,685.71/4,021.70 = 1,590.86/x
  3. Step 3: Cross multiply
    2,685.71x = 4,021.70 × 1,590.86
  4. Step 4: Simplify right side
    2,685.71x = 6,397,963.76
  5. Step 5: Solve for x
    x = 6,397,963.76/2,685.71
  6. Step 6: Final answer
    x = 2,382.22

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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.