Home / 1,289,636.80-1,936,010.40-721,470.40

Finding the Fourth Proportional to 1,289,636.80, 1,936,010.40 and 721,470.40

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Solution

The fourth proportional to 1,289,636.80, 1,936,010.40 and 721,470.40 is: 1,083,075.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,636.80 : 1,936,010.40 = 721,470.40 : x
  2. Step 2: Convert to fraction form
    1,289,636.80/1,936,010.40 = 721,470.40/x
  3. Step 3: Cross multiply
    1,289,636.80x = 1,936,010.40 × 721,470.40
  4. Step 4: Simplify right side
    1,289,636.80x = 1,396,774,197,692.16
  5. Step 5: Solve for x
    x = 1,396,774,197,692.16/1,289,636.80
  6. Step 6: Final answer
    x = 1,083,075.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.