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Finding the Fourth Proportional to 325,353.60, 487,985.40 and 100,868.40

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Solution

The fourth proportional to 325,353.60, 487,985.40 and 100,868.40 is: 151,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,353.60 : 487,985.40 = 100,868.40 : x
  2. Step 2: Convert to fraction form
    325,353.60/487,985.40 = 100,868.40/x
  3. Step 3: Cross multiply
    325,353.60x = 487,985.40 × 100,868.40
  4. Step 4: Simplify right side
    325,353.60x = 49,222,306,521.36
  5. Step 5: Solve for x
    x = 49,222,306,521.36/325,353.60
  6. Step 6: Final answer
    x = 151,288.65

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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.