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Finding the Fourth Proportional to 386,373.60, 579,290.40 and 228,520.80

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Solution

The fourth proportional to 386,373.60, 579,290.40 and 228,520.80 is: 342,621.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,373.60 : 579,290.40 = 228,520.80 : x
  2. Step 2: Convert to fraction form
    386,373.60/579,290.40 = 228,520.80/x
  3. Step 3: Cross multiply
    386,373.60x = 579,290.40 × 228,520.80
  4. Step 4: Simplify right side
    386,373.60x = 132,379,905,640.32
  5. Step 5: Solve for x
    x = 132,379,905,640.32/386,373.60
  6. Step 6: Final answer
    x = 342,621.51

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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.