Home / 389,853.80-584,975.10-221,503.40

Finding the Fourth Proportional to 389,853.80, 584,975.10 and 221,503.40

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Solution

The fourth proportional to 389,853.80, 584,975.10 and 221,503.40 is: 332,365.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,853.80 : 584,975.10 = 221,503.40 : x
  2. Step 2: Convert to fraction form
    389,853.80/584,975.10 = 221,503.40/x
  3. Step 3: Cross multiply
    389,853.80x = 584,975.10 × 221,503.40
  4. Step 4: Simplify right side
    389,853.80x = 129,573,973,565.34
  5. Step 5: Solve for x
    x = 129,573,973,565.34/389,853.80
  6. Step 6: Final answer
    x = 332,365.55

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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.