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Finding the Fourth Proportional to 708,817.08, 978,191.20 and 386,544.82

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Solution

The fourth proportional to 708,817.08, 978,191.20 and 386,544.82 is: 533,444.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,817.08 : 978,191.20 = 386,544.82 : x
  2. Step 2: Convert to fraction form
    708,817.08/978,191.20 = 386,544.82/x
  3. Step 3: Cross multiply
    708,817.08x = 978,191.20 × 386,544.82
  4. Step 4: Simplify right side
    708,817.08x = 378,114,741,329.58
  5. Step 5: Solve for x
    x = 378,114,741,329.58/708,817.08
  6. Step 6: Final answer
    x = 533,444.74

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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.