Home / 389,912.40-584,868.60-212,765.40

Finding the Fourth Proportional to 389,912.40, 584,868.60 and 212,765.40

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Solution

The fourth proportional to 389,912.40, 584,868.60 and 212,765.40 is: 319,148.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,912.40 : 584,868.60 = 212,765.40 : x
  2. Step 2: Convert to fraction form
    389,912.40/584,868.60 = 212,765.40/x
  3. Step 3: Cross multiply
    389,912.40x = 584,868.60 × 212,765.40
  4. Step 4: Simplify right side
    389,912.40x = 124,439,801,626.44
  5. Step 5: Solve for x
    x = 124,439,801,626.44/389,912.40
  6. Step 6: Final answer
    x = 319,148.10

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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.