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Finding the Fourth Proportional to 678,127.84, 935,784.88 and 376,319.20

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Solution

The fourth proportional to 678,127.84, 935,784.88 and 376,319.20 is: 519,302.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,127.84 : 935,784.88 = 376,319.20 : x
  2. Step 2: Convert to fraction form
    678,127.84/935,784.88 = 376,319.20/x
  3. Step 3: Cross multiply
    678,127.84x = 935,784.88 × 376,319.20
  4. Step 4: Simplify right side
    678,127.84x = 352,153,817,413.70
  5. Step 5: Solve for x
    x = 352,153,817,413.70/678,127.84
  6. Step 6: Final answer
    x = 519,302.99

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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.