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Finding the Fourth Proportional to 685,738.90, 957,672.50 and 685,738.90

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Solution

The fourth proportional to 685,738.90, 957,672.50 and 685,738.90 is: 957,672.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,738.90 : 957,672.50 = 685,738.90 : x
  2. Step 2: Convert to fraction form
    685,738.90/957,672.50 = 685,738.90/x
  3. Step 3: Cross multiply
    685,738.90x = 957,672.50 × 685,738.90
  4. Step 4: Simplify right side
    685,738.90x = 656,713,286,710.25
  5. Step 5: Solve for x
    x = 656,713,286,710.25/685,738.90
  6. Step 6: Final answer
    x = 957,672.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.