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Finding the Fourth Proportional to 545,875.20, 818,958.60 and 487,117.80

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Solution

The fourth proportional to 545,875.20, 818,958.60 and 487,117.80 is: 730,806.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,875.20 : 818,958.60 = 487,117.80 : x
  2. Step 2: Convert to fraction form
    545,875.20/818,958.60 = 487,117.80/x
  3. Step 3: Cross multiply
    545,875.20x = 818,958.60 × 487,117.80
  4. Step 4: Simplify right side
    545,875.20x = 398,929,311,523.08
  5. Step 5: Solve for x
    x = 398,929,311,523.08/545,875.20
  6. Step 6: Final answer
    x = 730,806.81

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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.