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Finding the Fourth Proportional to 685,724.40, 957,652.20 and 685,724.40

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Solution

The fourth proportional to 685,724.40, 957,652.20 and 685,724.40 is: 957,652.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,724.40 : 957,652.20 = 685,724.40 : x
  2. Step 2: Convert to fraction form
    685,724.40/957,652.20 = 685,724.40/x
  3. Step 3: Cross multiply
    685,724.40x = 957,652.20 × 685,724.40
  4. Step 4: Simplify right side
    685,724.40x = 656,685,480,253.68
  5. Step 5: Solve for x
    x = 656,685,480,253.68/685,724.40
  6. Step 6: Final answer
    x = 957,652.20

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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.