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Finding the Fourth Proportional to 402,989.37, 603,985.83 and 203,366.88

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Solution

The fourth proportional to 402,989.37, 603,985.83 and 203,366.88 is: 304,798.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,989.37 : 603,985.83 = 203,366.88 : x
  2. Step 2: Convert to fraction form
    402,989.37/603,985.83 = 203,366.88/x
  3. Step 3: Cross multiply
    402,989.37x = 603,985.83 × 203,366.88
  4. Step 4: Simplify right side
    402,989.37x = 122,830,713,811.31
  5. Step 5: Solve for x
    x = 122,830,713,811.31/402,989.37
  6. Step 6: Final answer
    x = 304,798.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.