Home / 1,431.01-1,974.09-900.55

Finding the Fourth Proportional to 1,431.01, 1,974.09 and 900.55

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Solution

The fourth proportional to 1,431.01, 1,974.09 and 900.55 is: 1,242.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.01 : 1,974.09 = 900.55 : x
  2. Step 2: Convert to fraction form
    1,431.01/1,974.09 = 900.55/x
  3. Step 3: Cross multiply
    1,431.01x = 1,974.09 × 900.55
  4. Step 4: Simplify right side
    1,431.01x = 1,777,756.88
  5. Step 5: Solve for x
    x = 1,777,756.88/1,431.01
  6. Step 6: Final answer
    x = 1,242.31

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1.5x scale

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.