Home / 1,291,289.20-1,936,933.80-866,136.40

Finding the Fourth Proportional to 1,291,289.20, 1,936,933.80 and 866,136.40

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Solution

The fourth proportional to 1,291,289.20, 1,936,933.80 and 866,136.40 is: 1,299,204.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,289.20 : 1,936,933.80 = 866,136.40 : x
  2. Step 2: Convert to fraction form
    1,291,289.20/1,936,933.80 = 866,136.40/x
  3. Step 3: Cross multiply
    1,291,289.20x = 1,936,933.80 × 866,136.40
  4. Step 4: Simplify right side
    1,291,289.20x = 1,677,648,868,570.32
  5. Step 5: Solve for x
    x = 1,677,648,868,570.32/1,291,289.20
  6. Step 6: Final answer
    x = 1,299,204.60

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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.