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Finding the Fourth Proportional to 612,995.70, 845,920.81 and 354,883.58

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Solution

The fourth proportional to 612,995.70, 845,920.81 and 354,883.58 is: 489,731.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,995.70 : 845,920.81 = 354,883.58 : x
  2. Step 2: Convert to fraction form
    612,995.70/845,920.81 = 354,883.58/x
  3. Step 3: Cross multiply
    612,995.70x = 845,920.81 × 354,883.58
  4. Step 4: Simplify right side
    612,995.70x = 300,203,405,449.30
  5. Step 5: Solve for x
    x = 300,203,405,449.30/612,995.70
  6. Step 6: Final answer
    x = 489,731.67

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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.