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Finding the Fourth Proportional to 678,114.36, 935,799 and 372,192.76

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Solution

The fourth proportional to 678,114.36, 935,799 and 372,192.76 is: 513,626.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,114.36 : 935,799 = 372,192.76 : x
  2. Step 2: Convert to fraction form
    678,114.36/935,799 = 372,192.76/x
  3. Step 3: Cross multiply
    678,114.36x = 935,799 × 372,192.76
  4. Step 4: Simplify right side
    678,114.36x = 348,297,612,615.24
  5. Step 5: Solve for x
    x = 348,297,612,615.24/678,114.36
  6. Step 6: Final answer
    x = 513,626.66

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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.