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Finding the Fourth Proportional to 219,646.81, 329,345.32 and 86,454.85

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Solution

The fourth proportional to 219,646.81, 329,345.32 and 86,454.85 is: 129,633.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,646.81 : 329,345.32 = 86,454.85 : x
  2. Step 2: Convert to fraction form
    219,646.81/329,345.32 = 86,454.85/x
  3. Step 3: Cross multiply
    219,646.81x = 329,345.32 × 86,454.85
  4. Step 4: Simplify right side
    219,646.81x = 28,473,499,806.53
  5. Step 5: Solve for x
    x = 28,473,499,806.53/219,646.81
  6. Step 6: Final answer
    x = 129,633.11

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1.5x scale

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.