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Finding the Fourth Proportional to 679,128.60, 936,011.16 and 497,454.42

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Solution

The fourth proportional to 679,128.60, 936,011.16 and 497,454.42 is: 685,618.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,128.60 : 936,011.16 = 497,454.42 : x
  2. Step 2: Convert to fraction form
    679,128.60/936,011.16 = 497,454.42/x
  3. Step 3: Cross multiply
    679,128.60x = 936,011.16 × 497,454.42
  4. Step 4: Simplify right side
    679,128.60x = 465,622,888,711.33
  5. Step 5: Solve for x
    x = 465,622,888,711.33/679,128.60
  6. Step 6: Final answer
    x = 685,618.14

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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.