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Finding the Fourth Proportional to 395,911.02, 546,569.19 and 309,686.79

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Solution

The fourth proportional to 395,911.02, 546,569.19 and 309,686.79 is: 427,533.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,911.02 : 546,569.19 = 309,686.79 : x
  2. Step 2: Convert to fraction form
    395,911.02/546,569.19 = 309,686.79/x
  3. Step 3: Cross multiply
    395,911.02x = 546,569.19 × 309,686.79
  4. Step 4: Simplify right side
    395,911.02x = 169,265,257,964.00
  5. Step 5: Solve for x
    x = 169,265,257,964.00/395,911.02
  6. Step 6: Final answer
    x = 427,533.59

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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.