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Finding the Fourth Proportional to 354,415.06, 489,104.59 and 193,278.90

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Solution

The fourth proportional to 354,415.06, 489,104.59 and 193,278.90 is: 266,731.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,415.06 : 489,104.59 = 193,278.90 : x
  2. Step 2: Convert to fraction form
    354,415.06/489,104.59 = 193,278.90/x
  3. Step 3: Cross multiply
    354,415.06x = 489,104.59 × 193,278.90
  4. Step 4: Simplify right side
    354,415.06x = 94,533,597,140.15
  5. Step 5: Solve for x
    x = 94,533,597,140.15/354,415.06
  6. Step 6: Final answer
    x = 266,731.32

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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.