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Finding the Fourth Proportional to 689,413.15, 951,001.61 and 413,699.68

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Solution

The fourth proportional to 689,413.15, 951,001.61 and 413,699.68 is: 570,672.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,413.15 : 951,001.61 = 413,699.68 : x
  2. Step 2: Convert to fraction form
    689,413.15/951,001.61 = 413,699.68/x
  3. Step 3: Cross multiply
    689,413.15x = 951,001.61 × 413,699.68
  4. Step 4: Simplify right side
    689,413.15x = 393,429,062,408.11
  5. Step 5: Solve for x
    x = 393,429,062,408.11/689,413.15
  6. Step 6: Final answer
    x = 570,672.41

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1.5x scale

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.