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Finding the Fourth Proportional to 328,525.76, 492,819.76 and 91,868.40

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Solution

The fourth proportional to 328,525.76, 492,819.76 and 91,868.40 is: 137,811.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,525.76 : 492,819.76 = 91,868.40 : x
  2. Step 2: Convert to fraction form
    328,525.76/492,819.76 = 91,868.40/x
  3. Step 3: Cross multiply
    328,525.76x = 492,819.76 × 91,868.40
  4. Step 4: Simplify right side
    328,525.76x = 45,274,562,839.58
  5. Step 5: Solve for x
    x = 45,274,562,839.58/328,525.76
  6. Step 6: Final answer
    x = 137,811.30

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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.