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Finding the Fourth Proportional to 386,437.60, 579,386.40 and 228,584.80

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Solution

The fourth proportional to 386,437.60, 579,386.40 and 228,584.80 is: 342,717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,437.60 : 579,386.40 = 228,584.80 : x
  2. Step 2: Convert to fraction form
    386,437.60/579,386.40 = 228,584.80/x
  3. Step 3: Cross multiply
    386,437.60x = 579,386.40 × 228,584.80
  4. Step 4: Simplify right side
    386,437.60x = 132,438,924,366.72
  5. Step 5: Solve for x
    x = 132,438,924,366.72/386,437.60
  6. Step 6: Final answer
    x = 342,717.49

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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.