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Finding the Fourth Proportional to 1,200.90, 1,653.03 and 906.06

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Solution

The fourth proportional to 1,200.90, 1,653.03 and 906.06 is: 1,247.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200.90 : 1,653.03 = 906.06 : x
  2. Step 2: Convert to fraction form
    1,200.90/1,653.03 = 906.06/x
  3. Step 3: Cross multiply
    1,200.90x = 1,653.03 × 906.06
  4. Step 4: Simplify right side
    1,200.90x = 1,497,744.36
  5. Step 5: Solve for x
    x = 1,497,744.36/1,200.90
  6. Step 6: Final answer
    x = 1,247.18

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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.