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Finding the Fourth Proportional to 545,261.94, 818,059.80 and 279,210.78

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Solution

The fourth proportional to 545,261.94, 818,059.80 and 279,210.78 is: 418,901.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,261.94 : 818,059.80 = 279,210.78 : x
  2. Step 2: Convert to fraction form
    545,261.94/818,059.80 = 279,210.78/x
  3. Step 3: Cross multiply
    545,261.94x = 818,059.80 × 279,210.78
  4. Step 4: Simplify right side
    545,261.94x = 228,411,114,844.64
  5. Step 5: Solve for x
    x = 228,411,114,844.64/545,261.94
  6. Step 6: Final answer
    x = 418,901.63

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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.