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Finding the Fourth Proportional to 547,705.65, 821,434.28 and 247,988.37

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Solution

The fourth proportional to 547,705.65, 821,434.28 and 247,988.37 is: 371,926.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,705.65 : 821,434.28 = 247,988.37 : x
  2. Step 2: Convert to fraction form
    547,705.65/821,434.28 = 247,988.37/x
  3. Step 3: Cross multiply
    547,705.65x = 821,434.28 × 247,988.37
  4. Step 4: Simplify right side
    547,705.65x = 203,706,146,919.38
  5. Step 5: Solve for x
    x = 203,706,146,919.38/547,705.65
  6. Step 6: Final answer
    x = 371,926.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.