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Finding the Fourth Proportional to 325,735.40, 488,603.10 and 279,079.40

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Solution

The fourth proportional to 325,735.40, 488,603.10 and 279,079.40 is: 418,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,735.40 : 488,603.10 = 279,079.40 : x
  2. Step 2: Convert to fraction form
    325,735.40/488,603.10 = 279,079.40/x
  3. Step 3: Cross multiply
    325,735.40x = 488,603.10 × 279,079.40
  4. Step 4: Simplify right side
    325,735.40x = 136,359,059,986.14
  5. Step 5: Solve for x
    x = 136,359,059,986.14/325,735.40
  6. Step 6: Final answer
    x = 418,619.10

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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.