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Finding the Fourth Proportional to 539,480.40, 809,220.60 and 493,990.80

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Solution

The fourth proportional to 539,480.40, 809,220.60 and 493,990.80 is: 740,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,480.40 : 809,220.60 = 493,990.80 : x
  2. Step 2: Convert to fraction form
    539,480.40/809,220.60 = 493,990.80/x
  3. Step 3: Cross multiply
    539,480.40x = 809,220.60 × 493,990.80
  4. Step 4: Simplify right side
    539,480.40x = 399,747,531,570.48
  5. Step 5: Solve for x
    x = 399,747,531,570.48/539,480.40
  6. Step 6: Final answer
    x = 740,986.20

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Double scale
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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.