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Finding the Fourth Proportional to 411,215.20, 616,822.80 and 395,468.80

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Solution

The fourth proportional to 411,215.20, 616,822.80 and 395,468.80 is: 593,203.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,215.20 : 616,822.80 = 395,468.80 : x
  2. Step 2: Convert to fraction form
    411,215.20/616,822.80 = 395,468.80/x
  3. Step 3: Cross multiply
    411,215.20x = 616,822.80 × 395,468.80
  4. Step 4: Simplify right side
    411,215.20x = 243,934,172,528.64
  5. Step 5: Solve for x
    x = 243,934,172,528.64/411,215.20
  6. Step 6: Final answer
    x = 593,203.20

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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.