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Finding the Fourth Proportional to 639,547.74, 882,570.17 and 353,061.68

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Solution

The fourth proportional to 639,547.74, 882,570.17 and 353,061.68 is: 487,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,547.74 : 882,570.17 = 353,061.68 : x
  2. Step 2: Convert to fraction form
    639,547.74/882,570.17 = 353,061.68/x
  3. Step 3: Cross multiply
    639,547.74x = 882,570.17 × 353,061.68
  4. Step 4: Simplify right side
    639,547.74x = 311,601,700,759.93
  5. Step 5: Solve for x
    x = 311,601,700,759.93/639,547.74
  6. Step 6: Final answer
    x = 487,221.96

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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.