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Finding the Fourth Proportional to 391,378.96, 586,878.54 and 191,465.20

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Solution

The fourth proportional to 391,378.96, 586,878.54 and 191,465.20 is: 287,104.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,378.96 : 586,878.54 = 191,465.20 : x
  2. Step 2: Convert to fraction form
    391,378.96/586,878.54 = 191,465.20/x
  3. Step 3: Cross multiply
    391,378.96x = 586,878.54 × 191,465.20
  4. Step 4: Simplify right side
    391,378.96x = 112,366,817,036.81
  5. Step 5: Solve for x
    x = 112,366,817,036.81/391,378.96
  6. Step 6: Final answer
    x = 287,104.90

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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.