Home / 809,128.80-1,212,089.40-709,401.60

Finding the Fourth Proportional to 809,128.80, 1,212,089.40 and 709,401.60

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Solution

The fourth proportional to 809,128.80, 1,212,089.40 and 709,401.60 is: 1,062,696.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,128.80 : 1,212,089.40 = 709,401.60 : x
  2. Step 2: Convert to fraction form
    809,128.80/1,212,089.40 = 709,401.60/x
  3. Step 3: Cross multiply
    809,128.80x = 1,212,089.40 × 709,401.60
  4. Step 4: Simplify right side
    809,128.80x = 859,858,159,703.04
  5. Step 5: Solve for x
    x = 859,858,159,703.04/809,128.80
  6. Step 6: Final answer
    x = 1,062,696.27

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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.