Home / 1,288,536.20-1,779,069.60-805,318.56

Finding the Fourth Proportional to 1,288,536.20, 1,779,069.60 and 805,318.56

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Solution

The fourth proportional to 1,288,536.20, 1,779,069.60 and 805,318.56 is: 1,111,895.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,536.20 : 1,779,069.60 = 805,318.56 : x
  2. Step 2: Convert to fraction form
    1,288,536.20/1,779,069.60 = 805,318.56/x
  3. Step 3: Cross multiply
    1,288,536.20x = 1,779,069.60 × 805,318.56
  4. Step 4: Simplify right side
    1,288,536.20x = 1,432,717,768,411.78
  5. Step 5: Solve for x
    x = 1,432,717,768,411.78/1,288,536.20
  6. Step 6: Final answer
    x = 1,111,895.63

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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.