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Finding the Fourth Proportional to 395,909.51, 546,567.12 and 309,685.29

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Solution

The fourth proportional to 395,909.51, 546,567.12 and 309,685.29 is: 427,531.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,909.51 : 546,567.12 = 309,685.29 : x
  2. Step 2: Convert to fraction form
    395,909.51/546,567.12 = 309,685.29/x
  3. Step 3: Cross multiply
    395,909.51x = 546,567.12 × 309,685.29
  4. Step 4: Simplify right side
    395,909.51x = 169,263,794,232.35
  5. Step 5: Solve for x
    x = 169,263,794,232.35/395,909.51
  6. Step 6: Final answer
    x = 427,531.52

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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.