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Finding the Fourth Proportional to 218,745.81, 328,236.36 and 210,783.86

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Solution

The fourth proportional to 218,745.81, 328,236.36 and 210,783.86 is: 316,289.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,745.81 : 328,236.36 = 210,783.86 : x
  2. Step 2: Convert to fraction form
    218,745.81/328,236.36 = 210,783.86/x
  3. Step 3: Cross multiply
    218,745.81x = 328,236.36 × 210,783.86
  4. Step 4: Simplify right side
    218,745.81x = 69,186,925,752.41
  5. Step 5: Solve for x
    x = 69,186,925,752.41/218,745.81
  6. Step 6: Final answer
    x = 316,289.15

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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.