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Finding the Fourth Proportional to 528,086.90, 792,907.95 and 409,891.70

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Solution

The fourth proportional to 528,086.90, 792,907.95 and 409,891.70 is: 615,441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,086.90 : 792,907.95 = 409,891.70 : x
  2. Step 2: Convert to fraction form
    528,086.90/792,907.95 = 409,891.70/x
  3. Step 3: Cross multiply
    528,086.90x = 792,907.95 × 409,891.70
  4. Step 4: Simplify right side
    528,086.90x = 325,006,387,569.02
  5. Step 5: Solve for x
    x = 325,006,387,569.02/528,086.90
  6. Step 6: Final answer
    x = 615,441.11

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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.