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Finding the Fourth Proportional to 656,618.40, 983,372.40 and 445,111.20

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Solution

The fourth proportional to 656,618.40, 983,372.40 and 445,111.20 is: 666,612.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,618.40 : 983,372.40 = 445,111.20 : x
  2. Step 2: Convert to fraction form
    656,618.40/983,372.40 = 445,111.20/x
  3. Step 3: Cross multiply
    656,618.40x = 983,372.40 × 445,111.20
  4. Step 4: Simplify right side
    656,618.40x = 437,710,069,010.88
  5. Step 5: Solve for x
    x = 437,710,069,010.88/656,618.40
  6. Step 6: Final answer
    x = 666,612.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.