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Finding the Fourth Proportional to 505,010.87, 697,838.79 and 480,409.55

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Solution

The fourth proportional to 505,010.87, 697,838.79 and 480,409.55 is: 663,843.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,010.87 : 697,838.79 = 480,409.55 : x
  2. Step 2: Convert to fraction form
    505,010.87/697,838.79 = 480,409.55/x
  3. Step 3: Cross multiply
    505,010.87x = 697,838.79 × 480,409.55
  4. Step 4: Simplify right side
    505,010.87x = 335,248,415,587.25
  5. Step 5: Solve for x
    x = 335,248,415,587.25/505,010.87
  6. Step 6: Final answer
    x = 663,843.97

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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.