Home / 1,288,592.80-1,779,147.68-805,375.20

Finding the Fourth Proportional to 1,288,592.80, 1,779,147.68 and 805,375.20

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Solution

The fourth proportional to 1,288,592.80, 1,779,147.68 and 805,375.20 is: 1,111,973.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,592.80 : 1,779,147.68 = 805,375.20 : x
  2. Step 2: Convert to fraction form
    1,288,592.80/1,779,147.68 = 805,375.20/x
  3. Step 3: Cross multiply
    1,288,592.80x = 1,779,147.68 × 805,375.20
  4. Step 4: Simplify right side
    1,288,592.80x = 1,432,881,418,609.54
  5. Step 5: Solve for x
    x = 1,432,881,418,609.54/1,288,592.80
  6. Step 6: Final answer
    x = 1,111,973.79

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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.