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Finding the Fourth Proportional to 691,792.32, 954,911.52 and 405,405.12

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Solution

The fourth proportional to 691,792.32, 954,911.52 and 405,405.12 is: 559,598.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,792.32 : 954,911.52 = 405,405.12 : x
  2. Step 2: Convert to fraction form
    691,792.32/954,911.52 = 405,405.12/x
  3. Step 3: Cross multiply
    691,792.32x = 954,911.52 × 405,405.12
  4. Step 4: Simplify right side
    691,792.32x = 387,126,019,354.98
  5. Step 5: Solve for x
    x = 387,126,019,354.98/691,792.32
  6. Step 6: Final answer
    x = 559,598.61

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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.