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Finding the Fourth Proportional to 687,042.36, 947,924.64 and 445,335.12

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Solution

The fourth proportional to 687,042.36, 947,924.64 and 445,335.12 is: 614,436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,042.36 : 947,924.64 = 445,335.12 : x
  2. Step 2: Convert to fraction form
    687,042.36/947,924.64 = 445,335.12/x
  3. Step 3: Cross multiply
    687,042.36x = 947,924.64 × 445,335.12
  4. Step 4: Simplify right side
    687,042.36x = 422,144,133,305.36
  5. Step 5: Solve for x
    x = 422,144,133,305.36/687,042.36
  6. Step 6: Final answer
    x = 614,436.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.