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Finding the Fourth Proportional to 978,006.69, 1,349,648.28 and 548,286.93

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Solution

The fourth proportional to 978,006.69, 1,349,648.28 and 548,286.93 is: 756,635.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,006.69 : 1,349,648.28 = 548,286.93 : x
  2. Step 2: Convert to fraction form
    978,006.69/1,349,648.28 = 548,286.93/x
  3. Step 3: Cross multiply
    978,006.69x = 1,349,648.28 × 548,286.93
  4. Step 4: Simplify right side
    978,006.69x = 739,994,512,020.98
  5. Step 5: Solve for x
    x = 739,994,512,020.98/978,006.69
  6. Step 6: Final answer
    x = 756,635.43

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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.