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Finding the Fourth Proportional to 505,767.86, 697,973.76 and 279,427.94

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Solution

The fourth proportional to 505,767.86, 697,973.76 and 279,427.94 is: 385,618.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,767.86 : 697,973.76 = 279,427.94 : x
  2. Step 2: Convert to fraction form
    505,767.86/697,973.76 = 279,427.94/x
  3. Step 3: Cross multiply
    505,767.86x = 697,973.76 × 279,427.94
  4. Step 4: Simplify right side
    505,767.86x = 195,033,369,930.85
  5. Step 5: Solve for x
    x = 195,033,369,930.85/505,767.86
  6. Step 6: Final answer
    x = 385,618.35

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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.