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Finding the Fourth Proportional to 612,391.37, 918,272.36 and 275,143.01

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Solution

The fourth proportional to 612,391.37, 918,272.36 and 275,143.01 is: 412,573.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,391.37 : 918,272.36 = 275,143.01 : x
  2. Step 2: Convert to fraction form
    612,391.37/918,272.36 = 275,143.01/x
  3. Step 3: Cross multiply
    612,391.37x = 918,272.36 × 275,143.01
  4. Step 4: Simplify right side
    612,391.37x = 252,656,217,226.70
  5. Step 5: Solve for x
    x = 252,656,217,226.70/612,391.37
  6. Step 6: Final answer
    x = 412,573.12

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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.