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Finding the Fourth Proportional to 386,513.60, 579,500.40 and 228,660.80

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Solution

The fourth proportional to 386,513.60, 579,500.40 and 228,660.80 is: 342,831.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,513.60 : 579,500.40 = 228,660.80 : x
  2. Step 2: Convert to fraction form
    386,513.60/579,500.40 = 228,660.80/x
  3. Step 3: Cross multiply
    386,513.60x = 579,500.40 × 228,660.80
  4. Step 4: Simplify right side
    386,513.60x = 132,509,025,064.32
  5. Step 5: Solve for x
    x = 132,509,025,064.32/386,513.60
  6. Step 6: Final answer
    x = 342,831.47

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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.