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Finding the Fourth Proportional to 623,862.96, 861,163.74 and 485,768.52

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Solution

The fourth proportional to 623,862.96, 861,163.74 and 485,768.52 is: 670,541.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,862.96 : 861,163.74 = 485,768.52 : x
  2. Step 2: Convert to fraction form
    623,862.96/861,163.74 = 485,768.52/x
  3. Step 3: Cross multiply
    623,862.96x = 861,163.74 × 485,768.52
  4. Step 4: Simplify right side
    623,862.96x = 418,326,235,457.47
  5. Step 5: Solve for x
    x = 418,326,235,457.47/623,862.96
  6. Step 6: Final answer
    x = 670,541.87

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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.