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Finding the Fourth Proportional to 1,273.03, 1,756.80 and 900.65

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Solution

The fourth proportional to 1,273.03, 1,756.80 and 900.65 is: 1,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.03 : 1,756.80 = 900.65 : x
  2. Step 2: Convert to fraction form
    1,273.03/1,756.80 = 900.65/x
  3. Step 3: Cross multiply
    1,273.03x = 1,756.80 × 900.65
  4. Step 4: Simplify right side
    1,273.03x = 1,582,261.92
  5. Step 5: Solve for x
    x = 1,582,261.92/1,273.03
  6. Step 6: Final answer
    x = 1,242.91

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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.