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Finding the Fourth Proportional to 639,496.85, 882,505.80 and 353,017.13

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Solution

The fourth proportional to 639,496.85, 882,505.80 and 353,017.13 is: 487,163.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,496.85 : 882,505.80 = 353,017.13 : x
  2. Step 2: Convert to fraction form
    639,496.85/882,505.80 = 353,017.13/x
  3. Step 3: Cross multiply
    639,496.85x = 882,505.80 × 353,017.13
  4. Step 4: Simplify right side
    639,496.85x = 311,539,660,311.83
  5. Step 5: Solve for x
    x = 311,539,660,311.83/639,496.85
  6. Step 6: Final answer
    x = 487,163.72

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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.