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Finding the Fourth Proportional to 279,145.80, 418,718.70 and 251,152.20

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Solution

The fourth proportional to 279,145.80, 418,718.70 and 251,152.20 is: 376,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,145.80 : 418,718.70 = 251,152.20 : x
  2. Step 2: Convert to fraction form
    279,145.80/418,718.70 = 251,152.20/x
  3. Step 3: Cross multiply
    279,145.80x = 418,718.70 × 251,152.20
  4. Step 4: Simplify right side
    279,145.80x = 105,162,122,686.14
  5. Step 5: Solve for x
    x = 105,162,122,686.14/279,145.80
  6. Step 6: Final answer
    x = 376,728.30

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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.