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Finding the Fourth Proportional to 1,373.36, 2,059.98 and 399.50

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Solution

The fourth proportional to 1,373.36, 2,059.98 and 399.50 is: 599.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.36 : 2,059.98 = 399.50 : x
  2. Step 2: Convert to fraction form
    1,373.36/2,059.98 = 399.50/x
  3. Step 3: Cross multiply
    1,373.36x = 2,059.98 × 399.50
  4. Step 4: Simplify right side
    1,373.36x = 822,962.01
  5. Step 5: Solve for x
    x = 822,962.01/1,373.36
  6. Step 6: Final answer
    x = 599.23

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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.