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Finding the Fourth Proportional to 668,913.50, 923,100.63 and 400,641.50

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Solution

The fourth proportional to 668,913.50, 923,100.63 and 400,641.50 is: 552,885.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,913.50 : 923,100.63 = 400,641.50 : x
  2. Step 2: Convert to fraction form
    668,913.50/923,100.63 = 400,641.50/x
  3. Step 3: Cross multiply
    668,913.50x = 923,100.63 × 400,641.50
  4. Step 4: Simplify right side
    668,913.50x = 369,832,421,054.15
  5. Step 5: Solve for x
    x = 369,832,421,054.15/668,913.50
  6. Step 6: Final answer
    x = 552,885.27

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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.