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Finding the Fourth Proportional to 259,341.40, 389,303.70 and 200,438.20

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Solution

The fourth proportional to 259,341.40, 389,303.70 and 200,438.20 is: 300,882.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,341.40 : 389,303.70 = 200,438.20 : x
  2. Step 2: Convert to fraction form
    259,341.40/389,303.70 = 200,438.20/x
  3. Step 3: Cross multiply
    259,341.40x = 389,303.70 × 200,438.20
  4. Step 4: Simplify right side
    259,341.40x = 78,031,332,881.34
  5. Step 5: Solve for x
    x = 78,031,332,881.34/259,341.40
  6. Step 6: Final answer
    x = 300,882.67

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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.