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Finding the Fourth Proportional to 713,771.78, 985,041.14 and 391,511.87

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Solution

The fourth proportional to 713,771.78, 985,041.14 and 391,511.87 is: 540,306.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,771.78 : 985,041.14 = 391,511.87 : x
  2. Step 2: Convert to fraction form
    713,771.78/985,041.14 = 391,511.87/x
  3. Step 3: Cross multiply
    713,771.78x = 985,041.14 × 391,511.87
  4. Step 4: Simplify right side
    713,771.78x = 385,655,291,865.57
  5. Step 5: Solve for x
    x = 385,655,291,865.57/713,771.78
  6. Step 6: Final answer
    x = 540,306.17

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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.