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Finding the Fourth Proportional to 419,510.40, 629,265.60 and 378,038.40

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Solution

The fourth proportional to 419,510.40, 629,265.60 and 378,038.40 is: 567,057.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,510.40 : 629,265.60 = 378,038.40 : x
  2. Step 2: Convert to fraction form
    419,510.40/629,265.60 = 378,038.40/x
  3. Step 3: Cross multiply
    419,510.40x = 629,265.60 × 378,038.40
  4. Step 4: Simplify right side
    419,510.40x = 237,886,560,599.04
  5. Step 5: Solve for x
    x = 237,886,560,599.04/419,510.40
  6. Step 6: Final answer
    x = 567,057.60

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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.