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Finding the Fourth Proportional to 484,621.81, 668,663.85 and 407,391.19

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Solution

The fourth proportional to 484,621.81, 668,663.85 and 407,391.19 is: 562,103.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,621.81 : 668,663.85 = 407,391.19 : x
  2. Step 2: Convert to fraction form
    484,621.81/668,663.85 = 407,391.19/x
  3. Step 3: Cross multiply
    484,621.81x = 668,663.85 × 407,391.19
  4. Step 4: Simplify right side
    484,621.81x = 272,407,761,561.48
  5. Step 5: Solve for x
    x = 272,407,761,561.48/484,621.81
  6. Step 6: Final answer
    x = 562,103.80

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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.