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Finding the Fourth Proportional to 355,100.58, 489,911.49 and 209,875.89

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Solution

The fourth proportional to 355,100.58, 489,911.49 and 209,875.89 is: 289,553.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,100.58 : 489,911.49 = 209,875.89 : x
  2. Step 2: Convert to fraction form
    355,100.58/489,911.49 = 209,875.89/x
  3. Step 3: Cross multiply
    355,100.58x = 489,911.49 × 209,875.89
  4. Step 4: Simplify right side
    355,100.58x = 102,820,609,984.98
  5. Step 5: Solve for x
    x = 102,820,609,984.98/355,100.58
  6. Step 6: Final answer
    x = 289,553.48

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1.5x scale

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.