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Finding the Fourth Proportional to 708,757.80, 978,049.80 and 386,465.28

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Solution

The fourth proportional to 708,757.80, 978,049.80 and 386,465.28 is: 533,302.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,757.80 : 978,049.80 = 386,465.28 : x
  2. Step 2: Convert to fraction form
    708,757.80/978,049.80 = 386,465.28/x
  3. Step 3: Cross multiply
    708,757.80x = 978,049.80 × 386,465.28
  4. Step 4: Simplify right side
    708,757.80x = 377,982,289,810.94
  5. Step 5: Solve for x
    x = 377,982,289,810.94/708,757.80
  6. Step 6: Final answer
    x = 533,302.48

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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.