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Finding the Fourth Proportional to 458,919.60, 687,707.10 and 411,534.60

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Solution

The fourth proportional to 458,919.60, 687,707.10 and 411,534.60 is: 616,699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,919.60 : 687,707.10 = 411,534.60 : x
  2. Step 2: Convert to fraction form
    458,919.60/687,707.10 = 411,534.60/x
  3. Step 3: Cross multiply
    458,919.60x = 687,707.10 × 411,534.60
  4. Step 4: Simplify right side
    458,919.60x = 283,015,266,315.66
  5. Step 5: Solve for x
    x = 283,015,266,315.66/458,919.60
  6. Step 6: Final answer
    x = 616,699.02

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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.