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Finding the Fourth Proportional to 612,989.83, 845,912.77 and 354,877.69

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Solution

The fourth proportional to 612,989.83, 845,912.77 and 354,877.69 is: 489,723.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,989.83 : 845,912.77 = 354,877.69 : x
  2. Step 2: Convert to fraction form
    612,989.83/845,912.77 = 354,877.69/x
  3. Step 3: Cross multiply
    612,989.83x = 845,912.77 × 354,877.69
  4. Step 4: Simplify right side
    612,989.83x = 300,195,570,339.40
  5. Step 5: Solve for x
    x = 300,195,570,339.40/612,989.83
  6. Step 6: Final answer
    x = 489,723.57

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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.