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Finding the Fourth Proportional to 1,173,000, 1,618,748.64 and 636,456

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Solution

The fourth proportional to 1,173,000, 1,618,748.64 and 636,456 is: 878,313.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173,000 : 1,618,748.64 = 636,456 : x
  2. Step 2: Convert to fraction form
    1,173,000/1,618,748.64 = 636,456/x
  3. Step 3: Cross multiply
    1,173,000x = 1,618,748.64 × 636,456
  4. Step 4: Simplify right side
    1,173,000x = 1,030,262,284,419.84
  5. Step 5: Solve for x
    x = 1,030,262,284,419.84/1,173,000
  6. Step 6: Final answer
    x = 878,313.97

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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.