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Finding the Fourth Proportional to 493,169.72, 680,574.35 and 278,355.29

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Solution

The fourth proportional to 493,169.72, 680,574.35 and 278,355.29 is: 384,130.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,169.72 : 680,574.35 = 278,355.29 : x
  2. Step 2: Convert to fraction form
    493,169.72/680,574.35 = 278,355.29/x
  3. Step 3: Cross multiply
    493,169.72x = 680,574.35 × 278,355.29
  4. Step 4: Simplify right side
    493,169.72x = 189,441,467,853.83
  5. Step 5: Solve for x
    x = 189,441,467,853.83/493,169.72
  6. Step 6: Final answer
    x = 384,130.38

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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.