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Finding the Fourth Proportional to 505,611, 697,743.18 and 279,271.08

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Solution

The fourth proportional to 505,611, 697,743.18 and 279,271.08 is: 385,394.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,611 : 697,743.18 = 279,271.08 : x
  2. Step 2: Convert to fraction form
    505,611/697,743.18 = 279,271.08/x
  3. Step 3: Cross multiply
    505,611x = 697,743.18 × 279,271.08
  4. Step 4: Simplify right side
    505,611x = 194,859,491,441.23
  5. Step 5: Solve for x
    x = 194,859,491,441.23/505,611
  6. Step 6: Final answer
    x = 385,394.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.