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Finding the Fourth Proportional to 395,215.90, 545,712.34 and 364,990.18

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Solution

The fourth proportional to 395,215.90, 545,712.34 and 364,990.18 is: 503,976.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,215.90 : 545,712.34 = 364,990.18 : x
  2. Step 2: Convert to fraction form
    395,215.90/545,712.34 = 364,990.18/x
  3. Step 3: Cross multiply
    395,215.90x = 545,712.34 × 364,990.18
  4. Step 4: Simplify right side
    395,215.90x = 199,179,645,204.82
  5. Step 5: Solve for x
    x = 199,179,645,204.82/395,215.90
  6. Step 6: Final answer
    x = 503,976.80

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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.