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Finding the Fourth Proportional to 691,990.90, 954,925.77 and 405,701.65

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Solution

The fourth proportional to 691,990.90, 954,925.77 and 405,701.65 is: 559,855.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,990.90 : 954,925.77 = 405,701.65 : x
  2. Step 2: Convert to fraction form
    691,990.90/954,925.77 = 405,701.65/x
  3. Step 3: Cross multiply
    691,990.90x = 954,925.77 × 405,701.65
  4. Step 4: Simplify right side
    691,990.90x = 387,414,960,516.52
  5. Step 5: Solve for x
    x = 387,414,960,516.52/691,990.90
  6. Step 6: Final answer
    x = 559,855.57

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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.