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Finding the Fourth Proportional to 621,730.69, 857,988.38 and 353,458.69

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Solution

The fourth proportional to 621,730.69, 857,988.38 and 353,458.69 is: 487,773.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,730.69 : 857,988.38 = 353,458.69 : x
  2. Step 2: Convert to fraction form
    621,730.69/857,988.38 = 353,458.69/x
  3. Step 3: Cross multiply
    621,730.69x = 857,988.38 × 353,458.69
  4. Step 4: Simplify right side
    621,730.69x = 303,263,447,568.70
  5. Step 5: Solve for x
    x = 303,263,447,568.70/621,730.69
  6. Step 6: Final answer
    x = 487,773.01

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1.5x scale

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.