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Finding the Fourth Proportional to 399,341.80, 598,235.10 and 221,530.60

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Solution

The fourth proportional to 399,341.80, 598,235.10 and 221,530.60 is: 331,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,341.80 : 598,235.10 = 221,530.60 : x
  2. Step 2: Convert to fraction form
    399,341.80/598,235.10 = 221,530.60/x
  3. Step 3: Cross multiply
    399,341.80x = 598,235.10 × 221,530.60
  4. Step 4: Simplify right side
    399,341.80x = 132,527,380,644.06
  5. Step 5: Solve for x
    x = 132,527,380,644.06/399,341.80
  6. Step 6: Final answer
    x = 331,864.53

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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.