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Finding the Fourth Proportional to 639,681.98, 882,737.94 and 353,195.91

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Solution

The fourth proportional to 639,681.98, 882,737.94 and 353,195.91 is: 487,397.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,681.98 : 882,737.94 = 353,195.91 : x
  2. Step 2: Convert to fraction form
    639,681.98/882,737.94 = 353,195.91/x
  3. Step 3: Cross multiply
    639,681.98x = 882,737.94 × 353,195.91
  4. Step 4: Simplify right side
    639,681.98x = 311,779,430,009.83
  5. Step 5: Solve for x
    x = 311,779,430,009.83/639,681.98
  6. Step 6: Final answer
    x = 487,397.55

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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.