Home / 648,491,400-972,837,876.96-217,770,672.96

Finding the Fourth Proportional to 648,491,400, 972,837,876.96 and 217,770,672.96

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Solution

The fourth proportional to 648,491,400, 972,837,876.96 and 217,770,672.96 is: 326,689,851.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,491,400 : 972,837,876.96 = 217,770,672.96 : x
  2. Step 2: Convert to fraction form
    648,491,400/972,837,876.96 = 217,770,672.96/x
  3. Step 3: Cross multiply
    648,491,400x = 972,837,876.96 × 217,770,672.96
  4. Step 4: Simplify right side
    648,491,400x = 211,855,559,146,556,896
  5. Step 5: Solve for x
    x = 211,855,559,146,556,896/648,491,400
  6. Step 6: Final answer
    x = 326,689,851.47

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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.