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Finding the Fourth Proportional to 519,823, 717,357.90 and 281,359

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Solution

The fourth proportional to 519,823, 717,357.90 and 281,359 is: 388,276.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,823 : 717,357.90 = 281,359 : x
  2. Step 2: Convert to fraction form
    519,823/717,357.90 = 281,359/x
  3. Step 3: Cross multiply
    519,823x = 717,357.90 × 281,359
  4. Step 4: Simplify right side
    519,823x = 201,835,101,386.10
  5. Step 5: Solve for x
    x = 201,835,101,386.10/519,823
  6. Step 6: Final answer
    x = 388,276.59

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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.