Home / 991,180.80-1,486,771.20-326,246.40

Finding the Fourth Proportional to 991,180.80, 1,486,771.20 and 326,246.40

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Solution

The fourth proportional to 991,180.80, 1,486,771.20 and 326,246.40 is: 489,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,180.80 : 1,486,771.20 = 326,246.40 : x
  2. Step 2: Convert to fraction form
    991,180.80/1,486,771.20 = 326,246.40/x
  3. Step 3: Cross multiply
    991,180.80x = 1,486,771.20 × 326,246.40
  4. Step 4: Simplify right side
    991,180.80x = 485,053,751,623.68
  5. Step 5: Solve for x
    x = 485,053,751,623.68/991,180.80
  6. Step 6: Final answer
    x = 489,369.60

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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.