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Finding the Fourth Proportional to 713,956.40, 985,267.36 and 391,667.12

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Solution

The fourth proportional to 713,956.40, 985,267.36 and 391,667.12 is: 540,504.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,956.40 : 985,267.36 = 391,667.12 : x
  2. Step 2: Convert to fraction form
    713,956.40/985,267.36 = 391,667.12/x
  3. Step 3: Cross multiply
    713,956.40x = 985,267.36 × 391,667.12
  4. Step 4: Simplify right side
    713,956.40x = 385,896,829,321.20
  5. Step 5: Solve for x
    x = 385,896,829,321.20/713,956.40
  6. Step 6: Final answer
    x = 540,504.76

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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.