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Finding the Fourth Proportional to 376,690.40, 564,160.80 and 257,717.60

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Solution

The fourth proportional to 376,690.40, 564,160.80 and 257,717.60 is: 385,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,690.40 : 564,160.80 = 257,717.60 : x
  2. Step 2: Convert to fraction form
    376,690.40/564,160.80 = 257,717.60/x
  3. Step 3: Cross multiply
    376,690.40x = 564,160.80 × 257,717.60
  4. Step 4: Simplify right side
    376,690.40x = 145,394,167,390.08
  5. Step 5: Solve for x
    x = 145,394,167,390.08/376,690.40
  6. Step 6: Final answer
    x = 385,977.89

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.