Home / 1,089,380.40-1,503,387.72-659,417.28

Finding the Fourth Proportional to 1,089,380.40, 1,503,387.72 and 659,417.28

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Solution

The fourth proportional to 1,089,380.40, 1,503,387.72 and 659,417.28 is: 910,021.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,380.40 : 1,503,387.72 = 659,417.28 : x
  2. Step 2: Convert to fraction form
    1,089,380.40/1,503,387.72 = 659,417.28/x
  3. Step 3: Cross multiply
    1,089,380.40x = 1,503,387.72 × 659,417.28
  4. Step 4: Simplify right side
    1,089,380.40x = 991,359,841,107.80
  5. Step 5: Solve for x
    x = 991,359,841,107.80/1,089,380.40
  6. Step 6: Final answer
    x = 910,021.73

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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.