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Finding the Fourth Proportional to 519,324.40, 778,986.60 and 342,031.60

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Solution

The fourth proportional to 519,324.40, 778,986.60 and 342,031.60 is: 513,047.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,324.40 : 778,986.60 = 342,031.60 : x
  2. Step 2: Convert to fraction form
    519,324.40/778,986.60 = 342,031.60/x
  3. Step 3: Cross multiply
    519,324.40x = 778,986.60 × 342,031.60
  4. Step 4: Simplify right side
    519,324.40x = 266,438,033,176.56
  5. Step 5: Solve for x
    x = 266,438,033,176.56/519,324.40
  6. Step 6: Final answer
    x = 513,047.40

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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.