Home / 681,721.20-1,021,813.80-326,905.20

Finding the Fourth Proportional to 681,721.20, 1,021,813.80 and 326,905.20

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Solution

The fourth proportional to 681,721.20, 1,021,813.80 and 326,905.20 is: 489,989.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,721.20 : 1,021,813.80 = 326,905.20 : x
  2. Step 2: Convert to fraction form
    681,721.20/1,021,813.80 = 326,905.20/x
  3. Step 3: Cross multiply
    681,721.20x = 1,021,813.80 × 326,905.20
  4. Step 4: Simplify right side
    681,721.20x = 334,036,244,651.76
  5. Step 5: Solve for x
    x = 334,036,244,651.76/681,721.20
  6. Step 6: Final answer
    x = 489,989.52

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1.5x scale

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.