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Finding the Fourth Proportional to 545,682.20, 818,523.30 and 521,187.80

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Solution

The fourth proportional to 545,682.20, 818,523.30 and 521,187.80 is: 781,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,682.20 : 818,523.30 = 521,187.80 : x
  2. Step 2: Convert to fraction form
    545,682.20/818,523.30 = 521,187.80/x
  3. Step 3: Cross multiply
    545,682.20x = 818,523.30 × 521,187.80
  4. Step 4: Simplify right side
    545,682.20x = 426,604,357,975.74
  5. Step 5: Solve for x
    x = 426,604,357,975.74/545,682.20
  6. Step 6: Final answer
    x = 781,781.70

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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.