Home / 389,921.60-584,590.80-212,628.80

Finding the Fourth Proportional to 389,921.60, 584,590.80 and 212,628.80

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Solution

The fourth proportional to 389,921.60, 584,590.80 and 212,628.80 is: 318,784.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,921.60 : 584,590.80 = 212,628.80 : x
  2. Step 2: Convert to fraction form
    389,921.60/584,590.80 = 212,628.80/x
  3. Step 3: Cross multiply
    389,921.60x = 584,590.80 × 212,628.80
  4. Step 4: Simplify right side
    389,921.60x = 124,300,840,295.04
  5. Step 5: Solve for x
    x = 124,300,840,295.04/389,921.60
  6. Step 6: Final answer
    x = 318,784.19

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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.