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Finding the Fourth Proportional to 545,818.20, 818,727.30 and 521,323.80

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Solution

The fourth proportional to 545,818.20, 818,727.30 and 521,323.80 is: 781,985.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,818.20 : 818,727.30 = 521,323.80 : x
  2. Step 2: Convert to fraction form
    545,818.20/818,727.30 = 521,323.80/x
  3. Step 3: Cross multiply
    545,818.20x = 818,727.30 × 521,323.80
  4. Step 4: Simplify right side
    545,818.20x = 426,822,027,199.74
  5. Step 5: Solve for x
    x = 426,822,027,199.74/545,818.20
  6. Step 6: Final answer
    x = 781,985.70

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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.