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Finding the Fourth Proportional to 1,211,248,509.60, 1,816,872,764.40 and 660,250,480.80

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Solution

The fourth proportional to 1,211,248,509.60, 1,816,872,764.40 and 660,250,480.80 is: 990,375,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,248,509.60 : 1,816,872,764.40 = 660,250,480.80 : x
  2. Step 2: Convert to fraction form
    1,211,248,509.60/1,816,872,764.40 = 660,250,480.80/x
  3. Step 3: Cross multiply
    1,211,248,509.60x = 1,816,872,764.40 × 660,250,480.80
  4. Step 4: Simplify right side
    1,211,248,509.60x = 1,199,591,116,247,525,120
  5. Step 5: Solve for x
    x = 1,199,591,116,247,525,120/1,211,248,509.60
  6. Step 6: Final answer
    x = 990,375,721.20

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Double scale
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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.