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Finding the Fourth Proportional to 1,203.78, 1,800.90 and 957.78

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Solution

The fourth proportional to 1,203.78, 1,800.90 and 957.78 is: 1,432.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.78 : 1,800.90 = 957.78 : x
  2. Step 2: Convert to fraction form
    1,203.78/1,800.90 = 957.78/x
  3. Step 3: Cross multiply
    1,203.78x = 1,800.90 × 957.78
  4. Step 4: Simplify right side
    1,203.78x = 1,724,866.00
  5. Step 5: Solve for x
    x = 1,724,866.00/1,203.78
  6. Step 6: Final answer
    x = 1,432.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.