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Finding the Fourth Proportional to 356,262.72, 491,679.63 and 211,155

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Solution

The fourth proportional to 356,262.72, 491,679.63 and 211,155 is: 291,415.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,262.72 : 491,679.63 = 211,155 : x
  2. Step 2: Convert to fraction form
    356,262.72/491,679.63 = 211,155/x
  3. Step 3: Cross multiply
    356,262.72x = 491,679.63 × 211,155
  4. Step 4: Simplify right side
    356,262.72x = 103,820,612,272.65
  5. Step 5: Solve for x
    x = 103,820,612,272.65/356,262.72
  6. Step 6: Final answer
    x = 291,415.87

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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.