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Finding the Fourth Proportional to 708,803.58, 978,172.56 and 386,531.31

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Solution

The fourth proportional to 708,803.58, 978,172.56 and 386,531.31 is: 533,426.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,803.58 : 978,172.56 = 386,531.31 : x
  2. Step 2: Convert to fraction form
    708,803.58/978,172.56 = 386,531.31/x
  3. Step 3: Cross multiply
    708,803.58x = 978,172.56 × 386,531.31
  4. Step 4: Simplify right side
    708,803.58x = 378,094,321,022.85
  5. Step 5: Solve for x
    x = 378,094,321,022.85/708,803.58
  6. Step 6: Final answer
    x = 533,426.09

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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.