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Finding the Fourth Proportional to 545,780.62, 818,818.64 and 309,289.38

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Solution

The fourth proportional to 545,780.62, 818,818.64 and 309,289.38 is: 464,017.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,780.62 : 818,818.64 = 309,289.38 : x
  2. Step 2: Convert to fraction form
    545,780.62/818,818.64 = 309,289.38/x
  3. Step 3: Cross multiply
    545,780.62x = 818,818.64 × 309,289.38
  4. Step 4: Simplify right side
    545,780.62x = 253,251,909,498.04
  5. Step 5: Solve for x
    x = 253,251,909,498.04/545,780.62
  6. Step 6: Final answer
    x = 464,017.78

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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.