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Finding the Fourth Proportional to 1,203.32, 1,660.20 and 705.80

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Solution

The fourth proportional to 1,203.32, 1,660.20 and 705.80 is: 973.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.32 : 1,660.20 = 705.80 : x
  2. Step 2: Convert to fraction form
    1,203.32/1,660.20 = 705.80/x
  3. Step 3: Cross multiply
    1,203.32x = 1,660.20 × 705.80
  4. Step 4: Simplify right side
    1,203.32x = 1,171,769.16
  5. Step 5: Solve for x
    x = 1,171,769.16/1,203.32
  6. Step 6: Final answer
    x = 973.78

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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.