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Finding the Fourth Proportional to 413,603.20, 620,404.80 and 371,612.80

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Solution

The fourth proportional to 413,603.20, 620,404.80 and 371,612.80 is: 557,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,603.20 : 620,404.80 = 371,612.80 : x
  2. Step 2: Convert to fraction form
    413,603.20/620,404.80 = 371,612.80/x
  3. Step 3: Cross multiply
    413,603.20x = 620,404.80 × 371,612.80
  4. Step 4: Simplify right side
    413,603.20x = 230,550,364,861.44
  5. Step 5: Solve for x
    x = 230,550,364,861.44/413,603.20
  6. Step 6: Final answer
    x = 557,419.20

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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.