Home / 920,615.70-1,380,923.55-289,722.90

Finding the Fourth Proportional to 920,615.70, 1,380,923.55 and 289,722.90

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Solution

The fourth proportional to 920,615.70, 1,380,923.55 and 289,722.90 is: 434,584.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,615.70 : 1,380,923.55 = 289,722.90 : x
  2. Step 2: Convert to fraction form
    920,615.70/1,380,923.55 = 289,722.90/x
  3. Step 3: Cross multiply
    920,615.70x = 1,380,923.55 × 289,722.90
  4. Step 4: Simplify right side
    920,615.70x = 400,085,175,584.30
  5. Step 5: Solve for x
    x = 400,085,175,584.30/920,615.70
  6. Step 6: Final answer
    x = 434,584.35

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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.