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Finding the Fourth Proportional to 407,808, 611,712 and 112,320

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Solution

The fourth proportional to 407,808, 611,712 and 112,320 is: 168,480

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,808 : 611,712 = 112,320 : x
  2. Step 2: Convert to fraction form
    407,808/611,712 = 112,320/x
  3. Step 3: Cross multiply
    407,808x = 611,712 × 112,320
  4. Step 4: Simplify right side
    407,808x = 68,707,491,840
  5. Step 5: Solve for x
    x = 68,707,491,840/407,808
  6. Step 6: Final answer
    x = 168,480

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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.