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Finding the Fourth Proportional to 325,284.90, 487,963.80 and 100,643.55

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Solution

The fourth proportional to 325,284.90, 487,963.80 and 100,643.55 is: 150,976.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,284.90 : 487,963.80 = 100,643.55 : x
  2. Step 2: Convert to fraction form
    325,284.90/487,963.80 = 100,643.55/x
  3. Step 3: Cross multiply
    325,284.90x = 487,963.80 × 100,643.55
  4. Step 4: Simplify right side
    325,284.90x = 49,110,409,103.49
  5. Step 5: Solve for x
    x = 49,110,409,103.49/325,284.90
  6. Step 6: Final answer
    x = 150,976.60

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1.5x scale

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.