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Finding the Fourth Proportional to 624,419.70, 936,629.55 and 455,145.90

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Solution

The fourth proportional to 624,419.70, 936,629.55 and 455,145.90 is: 682,718.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,419.70 : 936,629.55 = 455,145.90 : x
  2. Step 2: Convert to fraction form
    624,419.70/936,629.55 = 455,145.90/x
  3. Step 3: Cross multiply
    624,419.70x = 936,629.55 × 455,145.90
  4. Step 4: Simplify right side
    624,419.70x = 426,303,099,501.35
  5. Step 5: Solve for x
    x = 426,303,099,501.35/624,419.70
  6. Step 6: Final answer
    x = 682,718.85

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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.