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Finding the Fourth Proportional to 713,787.89, 985,028.70 and 391,500.63

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Solution

The fourth proportional to 713,787.89, 985,028.70 and 391,500.63 is: 540,271.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,787.89 : 985,028.70 = 391,500.63 : x
  2. Step 2: Convert to fraction form
    713,787.89/985,028.70 = 391,500.63/x
  3. Step 3: Cross multiply
    713,787.89x = 985,028.70 × 391,500.63
  4. Step 4: Simplify right side
    713,787.89x = 385,639,356,618.08
  5. Step 5: Solve for x
    x = 385,639,356,618.08/713,787.89
  6. Step 6: Final answer
    x = 540,271.65

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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.