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Finding the Fourth Proportional to 646,561.80, 969,842.70 and 247,215.60

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Solution

The fourth proportional to 646,561.80, 969,842.70 and 247,215.60 is: 370,823.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,561.80 : 969,842.70 = 247,215.60 : x
  2. Step 2: Convert to fraction form
    646,561.80/969,842.70 = 247,215.60/x
  3. Step 3: Cross multiply
    646,561.80x = 969,842.70 × 247,215.60
  4. Step 4: Simplify right side
    646,561.80x = 239,760,244,986.12
  5. Step 5: Solve for x
    x = 239,760,244,986.12/646,561.80
  6. Step 6: Final answer
    x = 370,823.40

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.