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Finding the Fourth Proportional to 660,025.20, 990,110.70 and 210,669.60

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Solution

The fourth proportional to 660,025.20, 990,110.70 and 210,669.60 is: 316,027.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,025.20 : 990,110.70 = 210,669.60 : x
  2. Step 2: Convert to fraction form
    660,025.20/990,110.70 = 210,669.60/x
  3. Step 3: Cross multiply
    660,025.20x = 990,110.70 × 210,669.60
  4. Step 4: Simplify right side
    660,025.20x = 208,586,225,124.72
  5. Step 5: Solve for x
    x = 208,586,225,124.72/660,025.20
  6. Step 6: Final answer
    x = 316,027.67

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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.