Home / 1,280,638.80-1,918,884.60-806,475.60

Finding the Fourth Proportional to 1,280,638.80, 1,918,884.60 and 806,475.60

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Solution

The fourth proportional to 1,280,638.80, 1,918,884.60 and 806,475.60 is: 1,208,407.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,638.80 : 1,918,884.60 = 806,475.60 : x
  2. Step 2: Convert to fraction form
    1,280,638.80/1,918,884.60 = 806,475.60/x
  3. Step 3: Cross multiply
    1,280,638.80x = 1,918,884.60 × 806,475.60
  4. Step 4: Simplify right side
    1,280,638.80x = 1,547,533,609,115.76
  5. Step 5: Solve for x
    x = 1,547,533,609,115.76/1,280,638.80
  6. Step 6: Final answer
    x = 1,208,407.56

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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.