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Finding the Fourth Proportional to 489,964.76, 676,088.66 and 285,968.90

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Solution

The fourth proportional to 489,964.76, 676,088.66 and 285,968.90 is: 394,600.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,964.76 : 676,088.66 = 285,968.90 : x
  2. Step 2: Convert to fraction form
    489,964.76/676,088.66 = 285,968.90/x
  3. Step 3: Cross multiply
    489,964.76x = 676,088.66 × 285,968.90
  4. Step 4: Simplify right side
    489,964.76x = 193,340,325,592.39
  5. Step 5: Solve for x
    x = 193,340,325,592.39/489,964.76
  6. Step 6: Final answer
    x = 394,600.48

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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.