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Finding the Fourth Proportional to 700,712.56, 966,984.42 and 398,906.56

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Solution

The fourth proportional to 700,712.56, 966,984.42 and 398,906.56 is: 550,491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,712.56 : 966,984.42 = 398,906.56 : x
  2. Step 2: Convert to fraction form
    700,712.56/966,984.42 = 398,906.56/x
  3. Step 3: Cross multiply
    700,712.56x = 966,984.42 × 398,906.56
  4. Step 4: Simplify right side
    700,712.56x = 385,736,428,555.80
  5. Step 5: Solve for x
    x = 385,736,428,555.80/700,712.56
  6. Step 6: Final answer
    x = 550,491.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.