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Finding the Fourth Proportional to 456,938.40, 685,407.60 and 443,816.40

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Solution

The fourth proportional to 456,938.40, 685,407.60 and 443,816.40 is: 665,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,938.40 : 685,407.60 = 443,816.40 : x
  2. Step 2: Convert to fraction form
    456,938.40/685,407.60 = 443,816.40/x
  3. Step 3: Cross multiply
    456,938.40x = 685,407.60 × 443,816.40
  4. Step 4: Simplify right side
    456,938.40x = 304,195,133,564.64
  5. Step 5: Solve for x
    x = 304,195,133,564.64/456,938.40
  6. Step 6: Final answer
    x = 665,724.60

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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.