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Finding the Fourth Proportional to 708,813.08, 978,185.67 and 386,540.81

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Solution

The fourth proportional to 708,813.08, 978,185.67 and 386,540.81 is: 533,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,813.08 : 978,185.67 = 386,540.81 : x
  2. Step 2: Convert to fraction form
    708,813.08/978,185.67 = 386,540.81/x
  3. Step 3: Cross multiply
    708,813.08x = 978,185.67 × 386,540.81
  4. Step 4: Simplify right side
    708,813.08x = 378,108,681,212.19
  5. Step 5: Solve for x
    x = 378,108,681,212.19/708,813.08
  6. Step 6: Final answer
    x = 533,439.20

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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.