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Finding the Fourth Proportional to 354,362.98, 489,139.41 and 211,167.94

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Solution

The fourth proportional to 354,362.98, 489,139.41 and 211,167.94 is: 291,482.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,362.98 : 489,139.41 = 211,167.94 : x
  2. Step 2: Convert to fraction form
    354,362.98/489,139.41 = 211,167.94/x
  3. Step 3: Cross multiply
    354,362.98x = 489,139.41 × 211,167.94
  4. Step 4: Simplify right side
    354,362.98x = 103,290,561,582.52
  5. Step 5: Solve for x
    x = 103,290,561,582.52/354,362.98
  6. Step 6: Final answer
    x = 291,482.37

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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.