Home / 389,611.20-584,013.60-211,742.40

Finding the Fourth Proportional to 389,611.20, 584,013.60 and 211,742.40

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Solution

The fourth proportional to 389,611.20, 584,013.60 and 211,742.40 is: 317,394.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,611.20 : 584,013.60 = 211,742.40 : x
  2. Step 2: Convert to fraction form
    389,611.20/584,013.60 = 211,742.40/x
  3. Step 3: Cross multiply
    389,611.20x = 584,013.60 × 211,742.40
  4. Step 4: Simplify right side
    389,611.20x = 123,660,441,296.64
  5. Step 5: Solve for x
    x = 123,660,441,296.64/389,611.20
  6. Step 6: Final answer
    x = 317,394.47

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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.