Home / 394,041,800.86-543,780,144.39-215,426,074.05

Finding the Fourth Proportional to 394,041,800.86, 543,780,144.39 and 215,426,074.05

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Solution

The fourth proportional to 394,041,800.86, 543,780,144.39 and 215,426,074.05 is: 297,289,326.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,041,800.86 : 543,780,144.39 = 215,426,074.05 : x
  2. Step 2: Convert to fraction form
    394,041,800.86/543,780,144.39 = 215,426,074.05/x
  3. Step 3: Cross multiply
    394,041,800.86x = 543,780,144.39 × 215,426,074.05
  4. Step 4: Simplify right side
    394,041,800.86x = 117,144,421,648,483,792
  5. Step 5: Solve for x
    x = 117,144,421,648,483,792/394,041,800.86
  6. Step 6: Final answer
    x = 297,289,326.65

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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.