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Finding the Fourth Proportional to 686,624.80, 947,352.14 and 396,216.15

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Solution

The fourth proportional to 686,624.80, 947,352.14 and 396,216.15 is: 546,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,624.80 : 947,352.14 = 396,216.15 : x
  2. Step 2: Convert to fraction form
    686,624.80/947,352.14 = 396,216.15/x
  3. Step 3: Cross multiply
    686,624.80x = 947,352.14 × 396,216.15
  4. Step 4: Simplify right side
    686,624.80x = 375,356,217,605.06
  5. Step 5: Solve for x
    x = 375,356,217,605.06/686,624.80
  6. Step 6: Final answer
    x = 546,668.60

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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.