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Finding the Fourth Proportional to 666,031.24, 919,194.35 and 408,079.38

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Solution

The fourth proportional to 666,031.24, 919,194.35 and 408,079.38 is: 563,193.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,031.24 : 919,194.35 = 408,079.38 : x
  2. Step 2: Convert to fraction form
    666,031.24/919,194.35 = 408,079.38/x
  3. Step 3: Cross multiply
    666,031.24x = 919,194.35 × 408,079.38
  4. Step 4: Simplify right side
    666,031.24x = 375,104,261,854.09
  5. Step 5: Solve for x
    x = 375,104,261,854.09/666,031.24
  6. Step 6: Final answer
    x = 563,193.19

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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.