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Finding the Fourth Proportional to 513,840.20, 770,760.30 and 489,345.80

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Solution

The fourth proportional to 513,840.20, 770,760.30 and 489,345.80 is: 734,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,840.20 : 770,760.30 = 489,345.80 : x
  2. Step 2: Convert to fraction form
    513,840.20/770,760.30 = 489,345.80/x
  3. Step 3: Cross multiply
    513,840.20x = 770,760.30 × 489,345.80
  4. Step 4: Simplify right side
    513,840.20x = 377,168,315,611.74
  5. Step 5: Solve for x
    x = 377,168,315,611.74/513,840.20
  6. Step 6: Final answer
    x = 734,018.70

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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.