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Finding the Fourth Proportional to 678,970.51, 937,060.76 and 407,187.92

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Solution

The fourth proportional to 678,970.51, 937,060.76 and 407,187.92 is: 561,968.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,970.51 : 937,060.76 = 407,187.92 : x
  2. Step 2: Convert to fraction form
    678,970.51/937,060.76 = 407,187.92/x
  3. Step 3: Cross multiply
    678,970.51x = 937,060.76 × 407,187.92
  4. Step 4: Simplify right side
    678,970.51x = 381,559,821,778.02
  5. Step 5: Solve for x
    x = 381,559,821,778.02/678,970.51
  6. Step 6: Final answer
    x = 561,968.18

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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.