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Finding the Fourth Proportional to 978,006.19, 1,349,647.59 and 548,286.43

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Solution

The fourth proportional to 978,006.19, 1,349,647.59 and 548,286.43 is: 756,634.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,006.19 : 1,349,647.59 = 548,286.43 : x
  2. Step 2: Convert to fraction form
    978,006.19/1,349,647.59 = 548,286.43/x
  3. Step 3: Cross multiply
    978,006.19x = 1,349,647.59 × 548,286.43
  4. Step 4: Simplify right side
    978,006.19x = 739,993,458,879.20
  5. Step 5: Solve for x
    x = 739,993,458,879.20/978,006.19
  6. Step 6: Final answer
    x = 756,634.74

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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.