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Finding the Fourth Proportional to 505,878.22, 698,106.99 and 279,518.86

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Solution

The fourth proportional to 505,878.22, 698,106.99 and 279,518.86 is: 385,733.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,878.22 : 698,106.99 = 279,518.86 : x
  2. Step 2: Convert to fraction form
    505,878.22/698,106.99 = 279,518.86/x
  3. Step 3: Cross multiply
    505,878.22x = 698,106.99 × 279,518.86
  4. Step 4: Simplify right side
    505,878.22x = 195,134,070,002.83
  5. Step 5: Solve for x
    x = 195,134,070,002.83/505,878.22
  6. Step 6: Final answer
    x = 385,733.29

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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.