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Finding the Fourth Proportional to 486,666.69, 729,999.82 and 354,388.69

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Solution

The fourth proportional to 486,666.69, 729,999.82 and 354,388.69 is: 531,582.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,666.69 : 729,999.82 = 354,388.69 : x
  2. Step 2: Convert to fraction form
    486,666.69/729,999.82 = 354,388.69/x
  3. Step 3: Cross multiply
    486,666.69x = 729,999.82 × 354,388.69
  4. Step 4: Simplify right side
    486,666.69x = 258,703,679,910.04
  5. Step 5: Solve for x
    x = 258,703,679,910.04/486,666.69
  6. Step 6: Final answer
    x = 531,582.88

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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.