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Finding the Fourth Proportional to 611,578.40, 917,367.60 and 521,036.60

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Solution

The fourth proportional to 611,578.40, 917,367.60 and 521,036.60 is: 781,554.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,578.40 : 917,367.60 = 521,036.60 : x
  2. Step 2: Convert to fraction form
    611,578.40/917,367.60 = 521,036.60/x
  3. Step 3: Cross multiply
    611,578.40x = 917,367.60 × 521,036.60
  4. Step 4: Simplify right side
    611,578.40x = 477,982,095,254.16
  5. Step 5: Solve for x
    x = 477,982,095,254.16/611,578.40
  6. Step 6: Final answer
    x = 781,554.90

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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.