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Finding the Fourth Proportional to 714,347.22, 985,859.66 and 392,111.90

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Solution

The fourth proportional to 714,347.22, 985,859.66 and 392,111.90 is: 541,147.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,347.22 : 985,859.66 = 392,111.90 : x
  2. Step 2: Convert to fraction form
    714,347.22/985,859.66 = 392,111.90/x
  3. Step 3: Cross multiply
    714,347.22x = 985,859.66 × 392,111.90
  4. Step 4: Simplify right side
    714,347.22x = 386,567,304,415.95
  5. Step 5: Solve for x
    x = 386,567,304,415.95/714,347.22
  6. Step 6: Final answer
    x = 541,147.63

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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.