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Finding the Fourth Proportional to 913,684.80, 1,260,866.48 and 505,786.88

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Solution

The fourth proportional to 913,684.80, 1,260,866.48 and 505,786.88 is: 697,975.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,684.80 : 1,260,866.48 = 505,786.88 : x
  2. Step 2: Convert to fraction form
    913,684.80/1,260,866.48 = 505,786.88/x
  3. Step 3: Cross multiply
    913,684.80x = 1,260,866.48 × 505,786.88
  4. Step 4: Simplify right side
    913,684.80x = 637,729,723,015.78
  5. Step 5: Solve for x
    x = 637,729,723,015.78/913,684.80
  6. Step 6: Final answer
    x = 697,975.63

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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.