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Finding the Fourth Proportional to 5,759.76, 8,639.70 and 1,864.20

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Solution

The fourth proportional to 5,759.76, 8,639.70 and 1,864.20 is: 2,796.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,759.76 : 8,639.70 = 1,864.20 : x
  2. Step 2: Convert to fraction form
    5,759.76/8,639.70 = 1,864.20/x
  3. Step 3: Cross multiply
    5,759.76x = 8,639.70 × 1,864.20
  4. Step 4: Simplify right side
    5,759.76x = 16,106,128.74
  5. Step 5: Solve for x
    x = 16,106,128.74/5,759.76
  6. Step 6: Final answer
    x = 2,796.32

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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.