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Finding the Fourth Proportional to 708,802.83, 978,171.53 and 386,530.56

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Solution

The fourth proportional to 708,802.83, 978,171.53 and 386,530.56 is: 533,425.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,802.83 : 978,171.53 = 386,530.56 : x
  2. Step 2: Convert to fraction form
    708,802.83/978,171.53 = 386,530.56/x
  3. Step 3: Cross multiply
    708,802.83x = 978,171.53 × 386,530.56
  4. Step 4: Simplify right side
    708,802.83x = 378,093,187,334.30
  5. Step 5: Solve for x
    x = 378,093,187,334.30/708,802.83
  6. Step 6: Final answer
    x = 533,425.05

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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.