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Finding the Fourth Proportional to 666,111.50, 919,178.30 and 375,707.06

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Solution

The fourth proportional to 666,111.50, 919,178.30 and 375,707.06 is: 518,444.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,111.50 : 919,178.30 = 375,707.06 : x
  2. Step 2: Convert to fraction form
    666,111.50/919,178.30 = 375,707.06/x
  3. Step 3: Cross multiply
    666,111.50x = 919,178.30 × 375,707.06
  4. Step 4: Simplify right side
    666,111.50x = 345,341,776,708.80
  5. Step 5: Solve for x
    x = 345,341,776,708.80/666,111.50
  6. Step 6: Final answer
    x = 518,444.40

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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.