Home / 1,289,938.12-1,780,911.30-831,214.60

Finding the Fourth Proportional to 1,289,938.12, 1,780,911.30 and 831,214.60

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Solution

The fourth proportional to 1,289,938.12, 1,780,911.30 and 831,214.60 is: 1,147,589.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,938.12 : 1,780,911.30 = 831,214.60 : x
  2. Step 2: Convert to fraction form
    1,289,938.12/1,780,911.30 = 831,214.60/x
  3. Step 3: Cross multiply
    1,289,938.12x = 1,780,911.30 × 831,214.60
  4. Step 4: Simplify right side
    1,289,938.12x = 1,480,319,473,864.98
  5. Step 5: Solve for x
    x = 1,480,319,473,864.98/1,289,938.12
  6. Step 6: Final answer
    x = 1,147,589.52

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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.