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Finding the Fourth Proportional to 395,910.51, 546,568.50 and 309,686.29

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Solution

The fourth proportional to 395,910.51, 546,568.50 and 309,686.29 is: 427,532.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,910.51 : 546,568.50 = 309,686.29 : x
  2. Step 2: Convert to fraction form
    395,910.51/546,568.50 = 309,686.29/x
  3. Step 3: Cross multiply
    395,910.51x = 546,568.50 × 309,686.29
  4. Step 4: Simplify right side
    395,910.51x = 169,264,770,995.87
  5. Step 5: Solve for x
    x = 169,264,770,995.87/395,910.51
  6. Step 6: Final answer
    x = 427,532.91

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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.