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Finding the Fourth Proportional to 1,270.88, 1,900.38 and 904.55

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Solution

The fourth proportional to 1,270.88, 1,900.38 and 904.55 is: 1,352.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.88 : 1,900.38 = 904.55 : x
  2. Step 2: Convert to fraction form
    1,270.88/1,900.38 = 904.55/x
  3. Step 3: Cross multiply
    1,270.88x = 1,900.38 × 904.55
  4. Step 4: Simplify right side
    1,270.88x = 1,718,979.23
  5. Step 5: Solve for x
    x = 1,718,979.23/1,270.88
  6. Step 6: Final answer
    x = 1,352.60

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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.