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Finding the Fourth Proportional to 1,360.36, 1,875.90 and 1,222.60

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Solution

The fourth proportional to 1,360.36, 1,875.90 and 1,222.60 is: 1,685.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.36 : 1,875.90 = 1,222.60 : x
  2. Step 2: Convert to fraction form
    1,360.36/1,875.90 = 1,222.60/x
  3. Step 3: Cross multiply
    1,360.36x = 1,875.90 × 1,222.60
  4. Step 4: Simplify right side
    1,360.36x = 2,293,475.34
  5. Step 5: Solve for x
    x = 2,293,475.34/1,360.36
  6. Step 6: Final answer
    x = 1,685.93

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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.