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Finding the Fourth Proportional to 456,722.40, 685,083.60 and 207,404.40

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Solution

The fourth proportional to 456,722.40, 685,083.60 and 207,404.40 is: 311,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,722.40 : 685,083.60 = 207,404.40 : x
  2. Step 2: Convert to fraction form
    456,722.40/685,083.60 = 207,404.40/x
  3. Step 3: Cross multiply
    456,722.40x = 685,083.60 × 207,404.40
  4. Step 4: Simplify right side
    456,722.40x = 142,089,353,007.84
  5. Step 5: Solve for x
    x = 142,089,353,007.84/456,722.40
  6. Step 6: Final answer
    x = 311,106.60

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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.