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Finding the Fourth Proportional to 612,964.20, 919,008.90 and 275,728.80

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Solution

The fourth proportional to 612,964.20, 919,008.90 and 275,728.80 is: 413,396.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,964.20 : 919,008.90 = 275,728.80 : x
  2. Step 2: Convert to fraction form
    612,964.20/919,008.90 = 275,728.80/x
  3. Step 3: Cross multiply
    612,964.20x = 919,008.90 × 275,728.80
  4. Step 4: Simplify right side
    612,964.20x = 253,397,221,186.32
  5. Step 5: Solve for x
    x = 253,397,221,186.32/612,964.20
  6. Step 6: Final answer
    x = 413,396.44

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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.