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Finding the Fourth Proportional to 867,958.80, 1,301,938.20 and 306,920.40

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Solution

The fourth proportional to 867,958.80, 1,301,938.20 and 306,920.40 is: 460,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,958.80 : 1,301,938.20 = 306,920.40 : x
  2. Step 2: Convert to fraction form
    867,958.80/1,301,938.20 = 306,920.40/x
  3. Step 3: Cross multiply
    867,958.80x = 1,301,938.20 × 306,920.40
  4. Step 4: Simplify right side
    867,958.80x = 399,591,393,119.28
  5. Step 5: Solve for x
    x = 399,591,393,119.28/867,958.80
  6. Step 6: Final answer
    x = 460,380.60

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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.