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Finding the Fourth Proportional to 383,357.50, 529,036.93 and 211,281.61

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Solution

The fourth proportional to 383,357.50, 529,036.93 and 211,281.61 is: 291,570.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,357.50 : 529,036.93 = 211,281.61 : x
  2. Step 2: Convert to fraction form
    383,357.50/529,036.93 = 211,281.61/x
  3. Step 3: Cross multiply
    383,357.50x = 529,036.93 × 211,281.61
  4. Step 4: Simplify right side
    383,357.50x = 111,775,774,319.86
  5. Step 5: Solve for x
    x = 111,775,774,319.86/383,357.50
  6. Step 6: Final answer
    x = 291,570.59

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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.