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Finding the Fourth Proportional to 395,208.32, 592,906.79 and 128,969.31

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Solution

The fourth proportional to 395,208.32, 592,906.79 and 128,969.31 is: 193,484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,208.32 : 592,906.79 = 128,969.31 : x
  2. Step 2: Convert to fraction form
    395,208.32/592,906.79 = 128,969.31/x
  3. Step 3: Cross multiply
    395,208.32x = 592,906.79 × 128,969.31
  4. Step 4: Simplify right side
    395,208.32x = 76,466,781,420.99
  5. Step 5: Solve for x
    x = 76,466,781,420.99/395,208.32
  6. Step 6: Final answer
    x = 193,484.75

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1.5x scale

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.