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Finding the Fourth Proportional to 1,222.54, 1,840.90 and 900.16

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Solution

The fourth proportional to 1,222.54, 1,840.90 and 900.16 is: 1,355.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.54 : 1,840.90 = 900.16 : x
  2. Step 2: Convert to fraction form
    1,222.54/1,840.90 = 900.16/x
  3. Step 3: Cross multiply
    1,222.54x = 1,840.90 × 900.16
  4. Step 4: Simplify right side
    1,222.54x = 1,657,104.54
  5. Step 5: Solve for x
    x = 1,657,104.54/1,222.54
  6. Step 6: Final answer
    x = 1,355.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.