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Finding the Fourth Proportional to 685,748.40, 957,685.80 and 685,748.40

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Solution

The fourth proportional to 685,748.40, 957,685.80 and 685,748.40 is: 957,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,748.40 : 957,685.80 = 685,748.40 : x
  2. Step 2: Convert to fraction form
    685,748.40/957,685.80 = 685,748.40/x
  3. Step 3: Cross multiply
    685,748.40x = 957,685.80 × 685,748.40
  4. Step 4: Simplify right side
    685,748.40x = 656,731,505,052.72
  5. Step 5: Solve for x
    x = 656,731,505,052.72/685,748.40
  6. Step 6: Final answer
    x = 957,685.80

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Double scale
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Similar ratio
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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.