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Finding the Fourth Proportional to 666,139.08, 919,359.54 and 379,593.48

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Solution

The fourth proportional to 666,139.08, 919,359.54 and 379,593.48 is: 523,888.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,139.08 : 919,359.54 = 379,593.48 : x
  2. Step 2: Convert to fraction form
    666,139.08/919,359.54 = 379,593.48/x
  3. Step 3: Cross multiply
    666,139.08x = 919,359.54 × 379,593.48
  4. Step 4: Simplify right side
    666,139.08x = 348,982,887,159.80
  5. Step 5: Solve for x
    x = 348,982,887,159.80/666,139.08
  6. Step 6: Final answer
    x = 523,888.93

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1.5x scale

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.