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Finding the Fourth Proportional to 355,784.88, 490,700.56 and 268,860.28

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Solution

The fourth proportional to 355,784.88, 490,700.56 and 268,860.28 is: 370,813.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,784.88 : 490,700.56 = 268,860.28 : x
  2. Step 2: Convert to fraction form
    355,784.88/490,700.56 = 268,860.28/x
  3. Step 3: Cross multiply
    355,784.88x = 490,700.56 × 268,860.28
  4. Step 4: Simplify right side
    355,784.88x = 131,929,889,957.76
  5. Step 5: Solve for x
    x = 131,929,889,957.76/355,784.88
  6. Step 6: Final answer
    x = 370,813.65

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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.