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Finding the Fourth Proportional to 259,918.40, 390,169.20 and 201,015.20

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Solution

The fourth proportional to 259,918.40, 390,169.20 and 201,015.20 is: 301,748.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,918.40 : 390,169.20 = 201,015.20 : x
  2. Step 2: Convert to fraction form
    259,918.40/390,169.20 = 201,015.20/x
  3. Step 3: Cross multiply
    259,918.40x = 390,169.20 × 201,015.20
  4. Step 4: Simplify right side
    259,918.40x = 78,429,939,771.84
  5. Step 5: Solve for x
    x = 78,429,939,771.84/259,918.40
  6. Step 6: Final answer
    x = 301,748.32

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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.