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Finding the Fourth Proportional to 666,306.81, 919,503.56 and 375,980.01

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Solution

The fourth proportional to 666,306.81, 919,503.56 and 375,980.01 is: 518,852.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,306.81 : 919,503.56 = 375,980.01 : x
  2. Step 2: Convert to fraction form
    666,306.81/919,503.56 = 375,980.01/x
  3. Step 3: Cross multiply
    666,306.81x = 919,503.56 × 375,980.01
  4. Step 4: Simplify right side
    666,306.81x = 345,714,957,683.84
  5. Step 5: Solve for x
    x = 345,714,957,683.84/666,306.81
  6. Step 6: Final answer
    x = 518,852.51

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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.