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Finding the Fourth Proportional to 539,617.78, 744,723.21 and 403,415.86

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Solution

The fourth proportional to 539,617.78, 744,723.21 and 403,415.86 is: 556,751.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,617.78 : 744,723.21 = 403,415.86 : x
  2. Step 2: Convert to fraction form
    539,617.78/744,723.21 = 403,415.86/x
  3. Step 3: Cross multiply
    539,617.78x = 744,723.21 × 403,415.86
  4. Step 4: Simplify right side
    539,617.78x = 300,433,154,224.11
  5. Step 5: Solve for x
    x = 300,433,154,224.11/539,617.78
  6. Step 6: Final answer
    x = 556,751.77

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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.