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Finding the Fourth Proportional to 3,580.81, 4,941.46 and 1,987.45

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Solution

The fourth proportional to 3,580.81, 4,941.46 and 1,987.45 is: 2,742.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,580.81 : 4,941.46 = 1,987.45 : x
  2. Step 2: Convert to fraction form
    3,580.81/4,941.46 = 1,987.45/x
  3. Step 3: Cross multiply
    3,580.81x = 4,941.46 × 1,987.45
  4. Step 4: Simplify right side
    3,580.81x = 9,820,911.42
  5. Step 5: Solve for x
    x = 9,820,911.42/3,580.81
  6. Step 6: Final answer
    x = 2,742.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.