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Finding the Fourth Proportional to 1,203.21, 1,659.98 and 705.67

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Solution

The fourth proportional to 1,203.21, 1,659.98 and 705.67 is: 973.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.21 : 1,659.98 = 705.67 : x
  2. Step 2: Convert to fraction form
    1,203.21/1,659.98 = 705.67/x
  3. Step 3: Cross multiply
    1,203.21x = 1,659.98 × 705.67
  4. Step 4: Simplify right side
    1,203.21x = 1,171,398.09
  5. Step 5: Solve for x
    x = 1,171,398.09/1,203.21
  6. Step 6: Final answer
    x = 973.56

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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.