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Finding the Fourth Proportional to 677,878.28, 935,554.98 and 391,397.89

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Solution

The fourth proportional to 677,878.28, 935,554.98 and 391,397.89 is: 540,176.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,878.28 : 935,554.98 = 391,397.89 : x
  2. Step 2: Convert to fraction form
    677,878.28/935,554.98 = 391,397.89/x
  3. Step 3: Cross multiply
    677,878.28x = 935,554.98 × 391,397.89
  4. Step 4: Simplify right side
    677,878.28x = 366,174,245,150.99
  5. Step 5: Solve for x
    x = 366,174,245,150.99/677,878.28
  6. Step 6: Final answer
    x = 540,176.98

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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.