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Finding the Fourth Proportional to 407,728.90, 611,593.35 and 403,792.30

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Solution

The fourth proportional to 407,728.90, 611,593.35 and 403,792.30 is: 605,688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,728.90 : 611,593.35 = 403,792.30 : x
  2. Step 2: Convert to fraction form
    407,728.90/611,593.35 = 403,792.30/x
  3. Step 3: Cross multiply
    407,728.90x = 611,593.35 × 403,792.30
  4. Step 4: Simplify right side
    407,728.90x = 246,956,685,461.21
  5. Step 5: Solve for x
    x = 246,956,685,461.21/407,728.90
  6. Step 6: Final answer
    x = 605,688.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.