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Finding the Fourth Proportional to 207,638.85, 311,458.28 and 207,638.85

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Solution

The fourth proportional to 207,638.85, 311,458.28 and 207,638.85 is: 311,458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,638.85 : 311,458.28 = 207,638.85 : x
  2. Step 2: Convert to fraction form
    207,638.85/311,458.28 = 207,638.85/x
  3. Step 3: Cross multiply
    207,638.85x = 311,458.28 × 207,638.85
  4. Step 4: Simplify right side
    207,638.85x = 64,670,838,043.98
  5. Step 5: Solve for x
    x = 64,670,838,043.98/207,638.85
  6. Step 6: Final answer
    x = 311,458.28

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1.5x scale

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.