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Finding the Fourth Proportional to 661,668.71, 992,509.20 and 188,354.05

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Solution

The fourth proportional to 661,668.71, 992,509.20 and 188,354.05 is: 282,532.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,668.71 : 992,509.20 = 188,354.05 : x
  2. Step 2: Convert to fraction form
    661,668.71/992,509.20 = 188,354.05/x
  3. Step 3: Cross multiply
    661,668.71x = 992,509.20 × 188,354.05
  4. Step 4: Simplify right side
    661,668.71x = 186,943,125,000.99
  5. Step 5: Solve for x
    x = 186,943,125,000.99/661,668.71
  6. Step 6: Final answer
    x = 282,532.82

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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.