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Finding the Fourth Proportional to 2,389.64, 3,584.88 and 829.58

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Solution

The fourth proportional to 2,389.64, 3,584.88 and 829.58 is: 1,244.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389.64 : 3,584.88 = 829.58 : x
  2. Step 2: Convert to fraction form
    2,389.64/3,584.88 = 829.58/x
  3. Step 3: Cross multiply
    2,389.64x = 3,584.88 × 829.58
  4. Step 4: Simplify right side
    2,389.64x = 2,973,926.83
  5. Step 5: Solve for x
    x = 2,973,926.83/2,389.64
  6. Step 6: Final answer
    x = 1,244.51

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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.