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Finding the Fourth Proportional to 354,359.48, 489,134.58 and 211,164.44

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Solution

The fourth proportional to 354,359.48, 489,134.58 and 211,164.44 is: 291,477.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,359.48 : 489,134.58 = 211,164.44 : x
  2. Step 2: Convert to fraction form
    354,359.48/489,134.58 = 211,164.44/x
  3. Step 3: Cross multiply
    354,359.48x = 489,134.58 × 211,164.44
  4. Step 4: Simplify right side
    354,359.48x = 103,287,829,670.34
  5. Step 5: Solve for x
    x = 103,287,829,670.34/354,359.48
  6. Step 6: Final answer
    x = 291,477.54

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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.