Home / 312,123,399.27-430,385,191.74-198,913,641.17

Finding the Fourth Proportional to 312,123,399.27, 430,385,191.74 and 198,913,641.17

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Solution

The fourth proportional to 312,123,399.27, 430,385,191.74 and 198,913,641.17 is: 274,280,895.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,123,399.27 : 430,385,191.74 = 198,913,641.17 : x
  2. Step 2: Convert to fraction form
    312,123,399.27/430,385,191.74 = 198,913,641.17/x
  3. Step 3: Cross multiply
    312,123,399.27x = 430,385,191.74 × 198,913,641.17
  4. Step 4: Simplify right side
    312,123,399.27x = 85,609,485,594,114,016
  5. Step 5: Solve for x
    x = 85,609,485,594,114,016/312,123,399.27
  6. Step 6: Final answer
    x = 274,280,895.94

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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.