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Finding the Fourth Proportional to 639,363.98, 882,259.47 and 352,865.57

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Solution

The fourth proportional to 639,363.98, 882,259.47 and 352,865.57 is: 486,919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,363.98 : 882,259.47 = 352,865.57 : x
  2. Step 2: Convert to fraction form
    639,363.98/882,259.47 = 352,865.57/x
  3. Step 3: Cross multiply
    639,363.98x = 882,259.47 × 352,865.57
  4. Step 4: Simplify right side
    639,363.98x = 311,318,986,358.15
  5. Step 5: Solve for x
    x = 311,318,986,358.15/639,363.98
  6. Step 6: Final answer
    x = 486,919.81

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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.