Home / 830,137.61-1,245,206.75-640,874.30

Finding the Fourth Proportional to 830,137.61, 1,245,206.75 and 640,874.30

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Solution

The fourth proportional to 830,137.61, 1,245,206.75 and 640,874.30 is: 961,311.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,137.61 : 1,245,206.75 = 640,874.30 : x
  2. Step 2: Convert to fraction form
    830,137.61/1,245,206.75 = 640,874.30/x
  3. Step 3: Cross multiply
    830,137.61x = 1,245,206.75 × 640,874.30
  4. Step 4: Simplify right side
    830,137.61x = 798,020,994,831.12
  5. Step 5: Solve for x
    x = 798,020,994,831.12/830,137.61
  6. Step 6: Final answer
    x = 961,311.70

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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.