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Finding the Fourth Proportional to 519,739.75, 717,240.90 and 281,275.75

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Solution

The fourth proportional to 519,739.75, 717,240.90 and 281,275.75 is: 388,160.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,739.75 : 717,240.90 = 281,275.75 : x
  2. Step 2: Convert to fraction form
    519,739.75/717,240.90 = 281,275.75/x
  3. Step 3: Cross multiply
    519,739.75x = 717,240.90 × 281,275.75
  4. Step 4: Simplify right side
    519,739.75x = 201,742,472,078.18
  5. Step 5: Solve for x
    x = 201,742,472,078.18/519,739.75
  6. Step 6: Final answer
    x = 388,160.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.