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Finding the Fourth Proportional to 519,815.76, 717,347.90 and 281,351.76

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Solution

The fourth proportional to 519,815.76, 717,347.90 and 281,351.76 is: 388,266.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,815.76 : 717,347.90 = 281,351.76 : x
  2. Step 2: Convert to fraction form
    519,815.76/717,347.90 = 281,351.76/x
  3. Step 3: Cross multiply
    519,815.76x = 717,347.90 × 281,351.76
  4. Step 4: Simplify right side
    519,815.76x = 201,827,094,197.30
  5. Step 5: Solve for x
    x = 201,827,094,197.30/519,815.76
  6. Step 6: Final answer
    x = 388,266.59

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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.