Home / 1,242,143.10-1,863,212.36-389,280.20

Finding the Fourth Proportional to 1,242,143.10, 1,863,212.36 and 389,280.20

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Solution

The fourth proportional to 1,242,143.10, 1,863,212.36 and 389,280.20 is: 583,919.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242,143.10 : 1,863,212.36 = 389,280.20 : x
  2. Step 2: Convert to fraction form
    1,242,143.10/1,863,212.36 = 389,280.20/x
  3. Step 3: Cross multiply
    1,242,143.10x = 1,863,212.36 × 389,280.20
  4. Step 4: Simplify right side
    1,242,143.10x = 725,311,668,880.81
  5. Step 5: Solve for x
    x = 725,311,668,880.81/1,242,143.10
  6. Step 6: Final answer
    x = 583,919.57

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1.5x scale

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.