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Finding the Fourth Proportional to 653,416.32, 901,812.16 and 398,915.36

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Solution

The fourth proportional to 653,416.32, 901,812.16 and 398,915.36 is: 550,562.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,416.32 : 901,812.16 = 398,915.36 : x
  2. Step 2: Convert to fraction form
    653,416.32/901,812.16 = 398,915.36/x
  3. Step 3: Cross multiply
    653,416.32x = 901,812.16 × 398,915.36
  4. Step 4: Simplify right side
    653,416.32x = 359,746,722,458.78
  5. Step 5: Solve for x
    x = 359,746,722,458.78/653,416.32
  6. Step 6: Final answer
    x = 550,562.81

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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.