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Finding the Fourth Proportional to 709,168.37, 978,651.06 and 386,878.48

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Solution

The fourth proportional to 709,168.37, 978,651.06 and 386,878.48 is: 533,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,168.37 : 978,651.06 = 386,878.48 : x
  2. Step 2: Convert to fraction form
    709,168.37/978,651.06 = 386,878.48/x
  3. Step 3: Cross multiply
    709,168.37x = 978,651.06 × 386,878.48
  4. Step 4: Simplify right side
    709,168.37x = 378,619,032,821.96
  5. Step 5: Solve for x
    x = 378,619,032,821.96/709,168.37
  6. Step 6: Final answer
    x = 533,891.60

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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.