Home / 1,223,919,813.20-1,688,960,067.72-666,990,902.48

Finding the Fourth Proportional to 1,223,919,813.20, 1,688,960,067.72 and 666,990,902.48

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Solution

The fourth proportional to 1,223,919,813.20, 1,688,960,067.72 and 666,990,902.48 is: 920,420,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,919,813.20 : 1,688,960,067.72 = 666,990,902.48 : x
  2. Step 2: Convert to fraction form
    1,223,919,813.20/1,688,960,067.72 = 666,990,902.48/x
  3. Step 3: Cross multiply
    1,223,919,813.20x = 1,688,960,067.72 × 666,990,902.48
  4. Step 4: Simplify right side
    1,223,919,813.20x = 1,126,520,999,821,244,800
  5. Step 5: Solve for x
    x = 1,126,520,999,821,244,800/1,223,919,813.20
  6. Step 6: Final answer
    x = 920,420,592.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.