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Finding the Fourth Proportional to 489,685.88, 735,855.60 and 265,212.20

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Solution

The fourth proportional to 489,685.88, 735,855.60 and 265,212.20 is: 398,536.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,685.88 : 735,855.60 = 265,212.20 : x
  2. Step 2: Convert to fraction form
    489,685.88/735,855.60 = 265,212.20/x
  3. Step 3: Cross multiply
    489,685.88x = 735,855.60 × 265,212.20
  4. Step 4: Simplify right side
    489,685.88x = 195,157,882,558.32
  5. Step 5: Solve for x
    x = 195,157,882,558.32/489,685.88
  6. Step 6: Final answer
    x = 398,536.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.