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Finding the Fourth Proportional to 660,023.20, 990,107.70 and 210,667.60

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Solution

The fourth proportional to 660,023.20, 990,107.70 and 210,667.60 is: 316,024.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,023.20 : 990,107.70 = 210,667.60 : x
  2. Step 2: Convert to fraction form
    660,023.20/990,107.70 = 210,667.60/x
  3. Step 3: Cross multiply
    660,023.20x = 990,107.70 × 210,667.60
  4. Step 4: Simplify right side
    660,023.20x = 208,583,612,900.52
  5. Step 5: Solve for x
    x = 208,583,612,900.52/660,023.20
  6. Step 6: Final answer
    x = 316,024.67

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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.