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Finding the Fourth Proportional to 612,986.54, 919,470.57 and 275,789.08

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Solution

The fourth proportional to 612,986.54, 919,470.57 and 275,789.08 is: 413,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,986.54 : 919,470.57 = 275,789.08 : x
  2. Step 2: Convert to fraction form
    612,986.54/919,470.57 = 275,789.08/x
  3. Step 3: Cross multiply
    612,986.54x = 919,470.57 × 275,789.08
  4. Step 4: Simplify right side
    612,986.54x = 253,579,942,587.38
  5. Step 5: Solve for x
    x = 253,579,942,587.38/612,986.54
  6. Step 6: Final answer
    x = 413,679.46

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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.