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Finding the Fourth Proportional to 624,412.70, 936,619.05 and 455,138.90

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Solution

The fourth proportional to 624,412.70, 936,619.05 and 455,138.90 is: 682,708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,412.70 : 936,619.05 = 455,138.90 : x
  2. Step 2: Convert to fraction form
    624,412.70/936,619.05 = 455,138.90/x
  3. Step 3: Cross multiply
    624,412.70x = 936,619.05 × 455,138.90
  4. Step 4: Simplify right side
    624,412.70x = 426,291,764,136.05
  5. Step 5: Solve for x
    x = 426,291,764,136.05/624,412.70
  6. Step 6: Final answer
    x = 682,708.35

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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.