Home / 686,874.40-1,030,311.60-313,626.40

Finding the Fourth Proportional to 686,874.40, 1,030,311.60 and 313,626.40

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Solution

The fourth proportional to 686,874.40, 1,030,311.60 and 313,626.40 is: 470,439.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,874.40 : 1,030,311.60 = 313,626.40 : x
  2. Step 2: Convert to fraction form
    686,874.40/1,030,311.60 = 313,626.40/x
  3. Step 3: Cross multiply
    686,874.40x = 1,030,311.60 × 313,626.40
  4. Step 4: Simplify right side
    686,874.40x = 323,132,917,986.24
  5. Step 5: Solve for x
    x = 323,132,917,986.24/686,874.40
  6. Step 6: Final answer
    x = 470,439.60

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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.