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Finding the Fourth Proportional to 300,072.90, 420,801.90 and 300,072.90

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Solution

The fourth proportional to 300,072.90, 420,801.90 and 300,072.90 is: 420,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,072.90 : 420,801.90 = 300,072.90 : x
  2. Step 2: Convert to fraction form
    300,072.90/420,801.90 = 300,072.90/x
  3. Step 3: Cross multiply
    300,072.90x = 420,801.90 × 300,072.90
  4. Step 4: Simplify right side
    300,072.90x = 126,271,246,458.51
  5. Step 5: Solve for x
    x = 126,271,246,458.51/300,072.90
  6. Step 6: Final answer
    x = 420,801.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.