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Finding the Fourth Proportional to 1,200.71, 1,801.07 and 713.64

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Solution

The fourth proportional to 1,200.71, 1,801.07 and 713.64 is: 1,070.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.71 : 1,801.07 = 713.64 : x
  2. Step 2: Convert to fraction form
    1,200.71/1,801.07 = 713.64/x
  3. Step 3: Cross multiply
    1,200.71x = 1,801.07 × 713.64
  4. Step 4: Simplify right side
    1,200.71x = 1,285,312.03
  5. Step 5: Solve for x
    x = 1,285,312.03/1,200.71
  6. Step 6: Final answer
    x = 1,070.46

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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.