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Finding the Fourth Proportional to 625,806.64, 863,607.68 and 353,928.08

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Solution

The fourth proportional to 625,806.64, 863,607.68 and 353,928.08 is: 488,417.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,806.64 : 863,607.68 = 353,928.08 : x
  2. Step 2: Convert to fraction form
    625,806.64/863,607.68 = 353,928.08/x
  3. Step 3: Cross multiply
    625,806.64x = 863,607.68 × 353,928.08
  4. Step 4: Simplify right side
    625,806.64x = 305,655,008,055.65
  5. Step 5: Solve for x
    x = 305,655,008,055.65/625,806.64
  6. Step 6: Final answer
    x = 488,417.65

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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.