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Finding the Fourth Proportional to 260,435.40, 390,069.90 and 201,078.60

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Solution

The fourth proportional to 260,435.40, 390,069.90 and 201,078.60 is: 301,167.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,435.40 : 390,069.90 = 201,078.60 : x
  2. Step 2: Convert to fraction form
    260,435.40/390,069.90 = 201,078.60/x
  3. Step 3: Cross multiply
    260,435.40x = 390,069.90 × 201,078.60
  4. Step 4: Simplify right side
    260,435.40x = 78,434,709,394.14
  5. Step 5: Solve for x
    x = 78,434,709,394.14/260,435.40
  6. Step 6: Final answer
    x = 301,167.62

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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.