Home / 489,721.60-734,582.40-331,091.20

Finding the Fourth Proportional to 489,721.60, 734,582.40 and 331,091.20

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Solution

The fourth proportional to 489,721.60, 734,582.40 and 331,091.20 is: 496,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,721.60 : 734,582.40 = 331,091.20 : x
  2. Step 2: Convert to fraction form
    489,721.60/734,582.40 = 331,091.20/x
  3. Step 3: Cross multiply
    489,721.60x = 734,582.40 × 331,091.20
  4. Step 4: Simplify right side
    489,721.60x = 243,213,768,314.88
  5. Step 5: Solve for x
    x = 243,213,768,314.88/489,721.60
  6. Step 6: Final answer
    x = 496,636.80

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Similar ratio
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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.