Home / 1,189,504.90-1,641,518.40-645,640.80

Finding the Fourth Proportional to 1,189,504.90, 1,641,518.40 and 645,640.80

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Solution

The fourth proportional to 1,189,504.90, 1,641,518.40 and 645,640.80 is: 890,985.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,504.90 : 1,641,518.40 = 645,640.80 : x
  2. Step 2: Convert to fraction form
    1,189,504.90/1,641,518.40 = 645,640.80/x
  3. Step 3: Cross multiply
    1,189,504.90x = 1,641,518.40 × 645,640.80
  4. Step 4: Simplify right side
    1,189,504.90x = 1,059,831,252,990.72
  5. Step 5: Solve for x
    x = 1,059,831,252,990.72/1,189,504.90
  6. Step 6: Final answer
    x = 890,985.19

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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.