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Finding the Fourth Proportional to 325,603.60, 487,749.30 and 219,315.40

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Solution

The fourth proportional to 325,603.60, 487,749.30 and 219,315.40 is: 328,531.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,603.60 : 487,749.30 = 219,315.40 : x
  2. Step 2: Convert to fraction form
    325,603.60/487,749.30 = 219,315.40/x
  3. Step 3: Cross multiply
    325,603.60x = 487,749.30 × 219,315.40
  4. Step 4: Simplify right side
    325,603.60x = 106,970,932,829.22
  5. Step 5: Solve for x
    x = 106,970,932,829.22/325,603.60
  6. Step 6: Final answer
    x = 328,531.17

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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.