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Finding the Fourth Proportional to 489,739.20, 734,608.80 and 434,626.80

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Solution

The fourth proportional to 489,739.20, 734,608.80 and 434,626.80 is: 651,940.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,739.20 : 734,608.80 = 434,626.80 : x
  2. Step 2: Convert to fraction form
    489,739.20/734,608.80 = 434,626.80/x
  3. Step 3: Cross multiply
    489,739.20x = 734,608.80 × 434,626.80
  4. Step 4: Simplify right side
    489,739.20x = 319,280,671,995.84
  5. Step 5: Solve for x
    x = 319,280,671,995.84/489,739.20
  6. Step 6: Final answer
    x = 651,940.20

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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.