Home / 1,288,578.81-1,779,128.37-805,361.16

Finding the Fourth Proportional to 1,288,578.81, 1,779,128.37 and 805,361.16

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Solution

The fourth proportional to 1,288,578.81, 1,779,128.37 and 805,361.16 is: 1,111,954.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,578.81 : 1,779,128.37 = 805,361.16 : x
  2. Step 2: Convert to fraction form
    1,288,578.81/1,779,128.37 = 805,361.16/x
  3. Step 3: Cross multiply
    1,288,578.81x = 1,779,128.37 × 805,361.16
  4. Step 4: Simplify right side
    1,288,578.81x = 1,432,840,887,852.11
  5. Step 5: Solve for x
    x = 1,432,840,887,852.11/1,288,578.81
  6. Step 6: Final answer
    x = 1,111,954.41

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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.