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Finding the Fourth Proportional to 395,989.20, 592,817.40 and 372,920.40

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Solution

The fourth proportional to 395,989.20, 592,817.40 and 372,920.40 is: 558,282.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,989.20 : 592,817.40 = 372,920.40 : x
  2. Step 2: Convert to fraction form
    395,989.20/592,817.40 = 372,920.40/x
  3. Step 3: Cross multiply
    395,989.20x = 592,817.40 × 372,920.40
  4. Step 4: Simplify right side
    395,989.20x = 221,073,701,934.96
  5. Step 5: Solve for x
    x = 221,073,701,934.96/395,989.20
  6. Step 6: Final answer
    x = 558,282.15

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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.