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Finding the Fourth Proportional to 379,897.86, 526,656.45 and 359,673.78

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Solution

The fourth proportional to 379,897.86, 526,656.45 and 359,673.78 is: 498,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,897.86 : 526,656.45 = 359,673.78 : x
  2. Step 2: Convert to fraction form
    379,897.86/526,656.45 = 359,673.78/x
  3. Step 3: Cross multiply
    379,897.86x = 526,656.45 × 359,673.78
  4. Step 4: Simplify right side
    379,897.86x = 189,424,516,132.88
  5. Step 5: Solve for x
    x = 189,424,516,132.88/379,897.86
  6. Step 6: Final answer
    x = 498,619.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.