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Finding the Fourth Proportional to 493,338.70, 680,938.98 and 278,604.46

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Solution

The fourth proportional to 493,338.70, 680,938.98 and 278,604.46 is: 384,548.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,338.70 : 680,938.98 = 278,604.46 : x
  2. Step 2: Convert to fraction form
    493,338.70/680,938.98 = 278,604.46/x
  3. Step 3: Cross multiply
    493,338.70x = 680,938.98 × 278,604.46
  4. Step 4: Simplify right side
    493,338.70x = 189,712,636,815.85
  5. Step 5: Solve for x
    x = 189,712,636,815.85/493,338.70
  6. Step 6: Final answer
    x = 384,548.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.