Home / 389,864.80-584,991.60-221,514.40

Finding the Fourth Proportional to 389,864.80, 584,991.60 and 221,514.40

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Solution

The fourth proportional to 389,864.80, 584,991.60 and 221,514.40 is: 332,382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,864.80 : 584,991.60 = 221,514.40 : x
  2. Step 2: Convert to fraction form
    389,864.80/584,991.60 = 221,514.40/x
  3. Step 3: Cross multiply
    389,864.80x = 584,991.60 × 221,514.40
  4. Step 4: Simplify right side
    389,864.80x = 129,584,063,279.04
  5. Step 5: Solve for x
    x = 129,584,063,279.04/389,864.80
  6. Step 6: Final answer
    x = 332,382.05

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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.