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Finding the Fourth Proportional to 383,886.95, 529,762.53 and 211,815.65

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Solution

The fourth proportional to 383,886.95, 529,762.53 and 211,815.65 is: 292,304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,886.95 : 529,762.53 = 211,815.65 : x
  2. Step 2: Convert to fraction form
    383,886.95/529,762.53 = 211,815.65/x
  3. Step 3: Cross multiply
    383,886.95x = 529,762.53 × 211,815.65
  4. Step 4: Simplify right side
    383,886.95x = 112,211,994,637.60
  5. Step 5: Solve for x
    x = 112,211,994,637.60/383,886.95
  6. Step 6: Final answer
    x = 292,304.79

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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.