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Finding the Fourth Proportional to 519,265.90, 778,898.85 and 318,936.70

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Solution

The fourth proportional to 519,265.90, 778,898.85 and 318,936.70 is: 478,405.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,265.90 : 778,898.85 = 318,936.70 : x
  2. Step 2: Convert to fraction form
    519,265.90/778,898.85 = 318,936.70/x
  3. Step 3: Cross multiply
    519,265.90x = 778,898.85 × 318,936.70
  4. Step 4: Simplify right side
    519,265.90x = 248,419,428,852.80
  5. Step 5: Solve for x
    x = 248,419,428,852.80/519,265.90
  6. Step 6: Final answer
    x = 478,405.05

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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.