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Finding the Fourth Proportional to 447,458.40, 670,496.40 and 388,015.20

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Solution

The fourth proportional to 447,458.40, 670,496.40 and 388,015.20 is: 581,423.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,458.40 : 670,496.40 = 388,015.20 : x
  2. Step 2: Convert to fraction form
    447,458.40/670,496.40 = 388,015.20/x
  3. Step 3: Cross multiply
    447,458.40x = 670,496.40 × 388,015.20
  4. Step 4: Simplify right side
    447,458.40x = 260,162,794,745.28
  5. Step 5: Solve for x
    x = 260,162,794,745.28/447,458.40
  6. Step 6: Final answer
    x = 581,423.42

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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.