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Finding the Fourth Proportional to 545,340.30, 817,682.40 and 279,619.80

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Solution

The fourth proportional to 545,340.30, 817,682.40 and 279,619.80 is: 419,261.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,340.30 : 817,682.40 = 279,619.80 : x
  2. Step 2: Convert to fraction form
    545,340.30/817,682.40 = 279,619.80/x
  3. Step 3: Cross multiply
    545,340.30x = 817,682.40 × 279,619.80
  4. Step 4: Simplify right side
    545,340.30x = 228,640,189,151.52
  5. Step 5: Solve for x
    x = 228,640,189,151.52/545,340.30
  6. Step 6: Final answer
    x = 419,261.49

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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.