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Finding the Fourth Proportional to 557,166.12, 768,936.83 and 315,491.28

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Solution

The fourth proportional to 557,166.12, 768,936.83 and 315,491.28 is: 435,404.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,166.12 : 768,936.83 = 315,491.28 : x
  2. Step 2: Convert to fraction form
    557,166.12/768,936.83 = 315,491.28/x
  3. Step 3: Cross multiply
    557,166.12x = 768,936.83 × 315,491.28
  4. Step 4: Simplify right side
    557,166.12x = 242,592,863,158.39
  5. Step 5: Solve for x
    x = 242,592,863,158.39/557,166.12
  6. Step 6: Final answer
    x = 435,404.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.