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Finding the Fourth Proportional to 605,763.60, 908,645.40 and 521,618.79

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Solution

The fourth proportional to 605,763.60, 908,645.40 and 521,618.79 is: 782,428.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,763.60 : 908,645.40 = 521,618.79 : x
  2. Step 2: Convert to fraction form
    605,763.60/908,645.40 = 521,618.79/x
  3. Step 3: Cross multiply
    605,763.60x = 908,645.40 × 521,618.79
  4. Step 4: Simplify right side
    605,763.60x = 473,966,514,087.07
  5. Step 5: Solve for x
    x = 473,966,514,087.07/605,763.60
  6. Step 6: Final answer
    x = 782,428.19

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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.