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Finding the Fourth Proportional to 519,316.80, 778,975.20 and 239,380.80

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Solution

The fourth proportional to 519,316.80, 778,975.20 and 239,380.80 is: 359,071.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,316.80 : 778,975.20 = 239,380.80 : x
  2. Step 2: Convert to fraction form
    519,316.80/778,975.20 = 239,380.80/x
  3. Step 3: Cross multiply
    519,316.80x = 778,975.20 × 239,380.80
  4. Step 4: Simplify right side
    519,316.80x = 186,471,706,556.16
  5. Step 5: Solve for x
    x = 186,471,706,556.16/519,316.80
  6. Step 6: Final answer
    x = 359,071.20

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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.