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Finding the Fourth Proportional to 678,057, 935,762.40 and 376,251

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Solution

The fourth proportional to 678,057, 935,762.40 and 376,251 is: 519,250.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,057 : 935,762.40 = 376,251 : x
  2. Step 2: Convert to fraction form
    678,057/935,762.40 = 376,251/x
  3. Step 3: Cross multiply
    678,057x = 935,762.40 × 376,251
  4. Step 4: Simplify right side
    678,057x = 352,081,538,762.40
  5. Step 5: Solve for x
    x = 352,081,538,762.40/678,057
  6. Step 6: Final answer
    x = 519,250.65

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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.