Home / 389,615.20-584,019.60-211,746.40

Finding the Fourth Proportional to 389,615.20, 584,019.60 and 211,746.40

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Solution

The fourth proportional to 389,615.20, 584,019.60 and 211,746.40 is: 317,400.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,615.20 : 584,019.60 = 211,746.40 : x
  2. Step 2: Convert to fraction form
    389,615.20/584,019.60 = 211,746.40/x
  3. Step 3: Cross multiply
    389,615.20x = 584,019.60 × 211,746.40
  4. Step 4: Simplify right side
    389,615.20x = 123,664,047,829.44
  5. Step 5: Solve for x
    x = 123,664,047,829.44/389,615.20
  6. Step 6: Final answer
    x = 317,400.47

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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.