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Finding the Fourth Proportional to 705,663.87, 973,836.06 and 399,740.15

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Solution

The fourth proportional to 705,663.87, 973,836.06 and 399,740.15 is: 551,652.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,663.87 : 973,836.06 = 399,740.15 : x
  2. Step 2: Convert to fraction form
    705,663.87/973,836.06 = 399,740.15/x
  3. Step 3: Cross multiply
    705,663.87x = 973,836.06 × 399,740.15
  4. Step 4: Simplify right side
    705,663.87x = 389,281,367,830.63
  5. Step 5: Solve for x
    x = 389,281,367,830.63/705,663.87
  6. Step 6: Final answer
    x = 551,652.68

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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.