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Finding the Fourth Proportional to 543,863.30, 815,904.30 and 455,727.20

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Solution

The fourth proportional to 543,863.30, 815,904.30 and 455,727.20 is: 683,682.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,863.30 : 815,904.30 = 455,727.20 : x
  2. Step 2: Convert to fraction form
    543,863.30/815,904.30 = 455,727.20/x
  3. Step 3: Cross multiply
    543,863.30x = 815,904.30 × 455,727.20
  4. Step 4: Simplify right side
    543,863.30x = 371,829,782,106.96
  5. Step 5: Solve for x
    x = 371,829,782,106.96/543,863.30
  6. Step 6: Final answer
    x = 683,682.43

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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.