Home / 312,123,401.28-430,385,194.50-198,913,643.16

Finding the Fourth Proportional to 312,123,401.28, 430,385,194.50 and 198,913,643.16

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Solution

The fourth proportional to 312,123,401.28, 430,385,194.50 and 198,913,643.16 is: 274,280,898.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,123,401.28 : 430,385,194.50 = 198,913,643.16 : x
  2. Step 2: Convert to fraction form
    312,123,401.28/430,385,194.50 = 198,913,643.16/x
  3. Step 3: Cross multiply
    312,123,401.28x = 430,385,194.50 × 198,913,643.16
  4. Step 4: Simplify right side
    312,123,401.28x = 85,609,487,000,120,192
  5. Step 5: Solve for x
    x = 85,609,487,000,120,192/312,123,401.28
  6. Step 6: Final answer
    x = 274,280,898.67

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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.