Home / 389,815.80-584,918.10-221,465.40

Finding the Fourth Proportional to 389,815.80, 584,918.10 and 221,465.40

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Solution

The fourth proportional to 389,815.80, 584,918.10 and 221,465.40 is: 332,308.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,815.80 : 584,918.10 = 221,465.40 : x
  2. Step 2: Convert to fraction form
    389,815.80/584,918.10 = 221,465.40/x
  3. Step 3: Cross multiply
    389,815.80x = 584,918.10 × 221,465.40
  4. Step 4: Simplify right side
    389,815.80x = 129,539,120,983.74
  5. Step 5: Solve for x
    x = 129,539,120,983.74/389,815.80
  6. Step 6: Final answer
    x = 332,308.54

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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.