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Finding the Fourth Proportional to 355,019.06, 489,989.58 and 209,818.86

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Solution

The fourth proportional to 355,019.06, 489,989.58 and 209,818.86 is: 289,587.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,019.06 : 489,989.58 = 209,818.86 : x
  2. Step 2: Convert to fraction form
    355,019.06/489,989.58 = 209,818.86/x
  3. Step 3: Cross multiply
    355,019.06x = 489,989.58 × 209,818.86
  4. Step 4: Simplify right side
    355,019.06x = 102,809,055,087.48
  5. Step 5: Solve for x
    x = 102,809,055,087.48/355,019.06
  6. Step 6: Final answer
    x = 289,587.42

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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.