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Finding the Fourth Proportional to 519,738.76, 717,239.50 and 281,274.76

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Solution

The fourth proportional to 519,738.76, 717,239.50 and 281,274.76 is: 388,159.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,738.76 : 717,239.50 = 281,274.76 : x
  2. Step 2: Convert to fraction form
    519,738.76/717,239.50 = 281,274.76/x
  3. Step 3: Cross multiply
    519,738.76x = 717,239.50 × 281,274.76
  4. Step 4: Simplify right side
    519,738.76x = 201,741,368,225.02
  5. Step 5: Solve for x
    x = 201,741,368,225.02/519,738.76
  6. Step 6: Final answer
    x = 388,159.17

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Half scale
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Double scale
Find fourth proportional to 519,739.76, 717,240.88 and 281,275.76
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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.