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Finding the Fourth Proportional to 305,289.59, 420,813.00 and 240,653.48

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Solution

The fourth proportional to 305,289.59, 420,813.00 and 240,653.48 is: 331,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,289.59 : 420,813.00 = 240,653.48 : x
  2. Step 2: Convert to fraction form
    305,289.59/420,813.00 = 240,653.48/x
  3. Step 3: Cross multiply
    305,289.59x = 420,813.00 × 240,653.48
  4. Step 4: Simplify right side
    305,289.59x = 101,270,114,833.72
  5. Step 5: Solve for x
    x = 101,270,114,833.72/305,289.59
  6. Step 6: Final answer
    x = 331,718.21

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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.