Home / 716,609.14-988,890.90-389,923.50

Finding the Fourth Proportional to 716,609.14, 988,890.90 and 389,923.50

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Solution

The fourth proportional to 716,609.14, 988,890.90 and 389,923.50 is: 538,078.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,609.14 : 988,890.90 = 389,923.50 : x
  2. Step 2: Convert to fraction form
    716,609.14/988,890.90 = 389,923.50/x
  3. Step 3: Cross multiply
    716,609.14x = 988,890.90 × 389,923.50
  4. Step 4: Simplify right side
    716,609.14x = 385,591,800,846.15
  5. Step 5: Solve for x
    x = 385,591,800,846.15/716,609.14
  6. Step 6: Final answer
    x = 538,078.26

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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.