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Finding the Fourth Proportional to 889,602.40, 1,334,403.60 and 328,520.80

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Solution

The fourth proportional to 889,602.40, 1,334,403.60 and 328,520.80 is: 492,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,602.40 : 1,334,403.60 = 328,520.80 : x
  2. Step 2: Convert to fraction form
    889,602.40/1,334,403.60 = 328,520.80/x
  3. Step 3: Cross multiply
    889,602.40x = 1,334,403.60 × 328,520.80
  4. Step 4: Simplify right side
    889,602.40x = 438,379,338,194.88
  5. Step 5: Solve for x
    x = 438,379,338,194.88/889,602.40
  6. Step 6: Final answer
    x = 492,781.20

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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.