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Finding the Fourth Proportional to 666,354.19, 919,568.78 and 360,430.55

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Solution

The fourth proportional to 666,354.19, 919,568.78 and 360,430.55 is: 497,394.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,354.19 : 919,568.78 = 360,430.55 : x
  2. Step 2: Convert to fraction form
    666,354.19/919,568.78 = 360,430.55/x
  3. Step 3: Cross multiply
    666,354.19x = 919,568.78 × 360,430.55
  4. Step 4: Simplify right side
    666,354.19x = 331,440,684,338.23
  5. Step 5: Solve for x
    x = 331,440,684,338.23/666,354.19
  6. Step 6: Final answer
    x = 497,394.16

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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.