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Finding the Fourth Proportional to 643,247.76, 886,656.60 and 507,059.76

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Solution

The fourth proportional to 643,247.76, 886,656.60 and 507,059.76 is: 698,934.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,247.76 : 886,656.60 = 507,059.76 : x
  2. Step 2: Convert to fraction form
    643,247.76/886,656.60 = 507,059.76/x
  3. Step 3: Cross multiply
    643,247.76x = 886,656.60 × 507,059.76
  4. Step 4: Simplify right side
    643,247.76x = 449,587,882,798.42
  5. Step 5: Solve for x
    x = 449,587,882,798.42/643,247.76
  6. Step 6: Final answer
    x = 698,934.24

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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.