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Finding the Fourth Proportional to 440,415.89, 607,763.80 and 256,642.75

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Solution

The fourth proportional to 440,415.89, 607,763.80 and 256,642.75 is: 354,161.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,415.89 : 607,763.80 = 256,642.75 : x
  2. Step 2: Convert to fraction form
    440,415.89/607,763.80 = 256,642.75/x
  3. Step 3: Cross multiply
    440,415.89x = 607,763.80 × 256,642.75
  4. Step 4: Simplify right side
    440,415.89x = 155,978,175,924.32
  5. Step 5: Solve for x
    x = 155,978,175,924.32/440,415.89
  6. Step 6: Final answer
    x = 354,161.10

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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.