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Finding the Fourth Proportional to 978,006.69, 1,349,648.33 and 548,286.91

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Solution

The fourth proportional to 978,006.69, 1,349,648.33 and 548,286.91 is: 756,635.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,006.69 : 1,349,648.33 = 548,286.91 : x
  2. Step 2: Convert to fraction form
    978,006.69/1,349,648.33 = 548,286.91/x
  3. Step 3: Cross multiply
    978,006.69x = 1,349,648.33 × 548,286.91
  4. Step 4: Simplify right side
    978,006.69x = 739,994,506,326.81
  5. Step 5: Solve for x
    x = 739,994,506,326.81/978,006.69
  6. Step 6: Final answer
    x = 756,635.42

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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.