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Finding the Fourth Proportional to 395,518.12, 545,664.39 and 292,399.90

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Solution

The fourth proportional to 395,518.12, 545,664.39 and 292,399.90 is: 403,400.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,518.12 : 545,664.39 = 292,399.90 : x
  2. Step 2: Convert to fraction form
    395,518.12/545,664.39 = 292,399.90/x
  3. Step 3: Cross multiply
    395,518.12x = 545,664.39 × 292,399.90
  4. Step 4: Simplify right side
    395,518.12x = 159,552,213,069.56
  5. Step 5: Solve for x
    x = 159,552,213,069.56/395,518.12
  6. Step 6: Final answer
    x = 403,400.51

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1.5x scale

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.