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Finding the Fourth Proportional to 356,578.55, 492,005.68 and 211,320.31

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Solution

The fourth proportional to 356,578.55, 492,005.68 and 211,320.31 is: 291,578.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,578.55 : 492,005.68 = 211,320.31 : x
  2. Step 2: Convert to fraction form
    356,578.55/492,005.68 = 211,320.31/x
  3. Step 3: Cross multiply
    356,578.55x = 492,005.68 × 211,320.31
  4. Step 4: Simplify right side
    356,578.55x = 103,970,789,302.73
  5. Step 5: Solve for x
    x = 103,970,789,302.73/356,578.55
  6. Step 6: Final answer
    x = 291,578.92

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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.