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Finding the Fourth Proportional to 259,384.40, 388,860.60 and 109,739.60

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Solution

The fourth proportional to 259,384.40, 388,860.60 and 109,739.60 is: 164,518.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,384.40 : 388,860.60 = 109,739.60 : x
  2. Step 2: Convert to fraction form
    259,384.40/388,860.60 = 109,739.60/x
  3. Step 3: Cross multiply
    259,384.40x = 388,860.60 × 109,739.60
  4. Step 4: Simplify right side
    259,384.40x = 42,673,406,699.76
  5. Step 5: Solve for x
    x = 42,673,406,699.76/259,384.40
  6. Step 6: Final answer
    x = 164,518.02

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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.