Home / 1,200,712.40-1,803,142.20-640,840.40

Finding the Fourth Proportional to 1,200,712.40, 1,803,142.20 and 640,840.40

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Solution

The fourth proportional to 1,200,712.40, 1,803,142.20 and 640,840.40 is: 962,367.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,712.40 : 1,803,142.20 = 640,840.40 : x
  2. Step 2: Convert to fraction form
    1,200,712.40/1,803,142.20 = 640,840.40/x
  3. Step 3: Cross multiply
    1,200,712.40x = 1,803,142.20 × 640,840.40
  4. Step 4: Simplify right side
    1,200,712.40x = 1,155,526,368,704.88
  5. Step 5: Solve for x
    x = 1,155,526,368,704.88/1,200,712.40
  6. Step 6: Final answer
    x = 962,367.32

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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.