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Finding the Fourth Proportional to 493,399.89, 680,897.42 and 289,454.28

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Solution

The fourth proportional to 493,399.89, 680,897.42 and 289,454.28 is: 399,450.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,399.89 : 680,897.42 = 289,454.28 : x
  2. Step 2: Convert to fraction form
    493,399.89/680,897.42 = 289,454.28/x
  3. Step 3: Cross multiply
    493,399.89x = 680,897.42 × 289,454.28
  4. Step 4: Simplify right side
    493,399.89x = 197,088,667,608.20
  5. Step 5: Solve for x
    x = 197,088,667,608.20/493,399.89
  6. Step 6: Final answer
    x = 399,450.17

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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.