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Finding the Fourth Proportional to 809,920.20, 1,214,880.30 and 360,640.20

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Solution

The fourth proportional to 809,920.20, 1,214,880.30 and 360,640.20 is: 540,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,920.20 : 1,214,880.30 = 360,640.20 : x
  2. Step 2: Convert to fraction form
    809,920.20/1,214,880.30 = 360,640.20/x
  3. Step 3: Cross multiply
    809,920.20x = 1,214,880.30 × 360,640.20
  4. Step 4: Simplify right side
    809,920.20x = 438,134,674,368.06
  5. Step 5: Solve for x
    x = 438,134,674,368.06/809,920.20
  6. Step 6: Final answer
    x = 540,960.30

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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.