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Finding the Fourth Proportional to 639,417.80, 882,396.64 and 352,937.96

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Solution

The fourth proportional to 639,417.80, 882,396.64 and 352,937.96 is: 487,054.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,417.80 : 882,396.64 = 352,937.96 : x
  2. Step 2: Convert to fraction form
    639,417.80/882,396.64 = 352,937.96/x
  3. Step 3: Cross multiply
    639,417.80x = 882,396.64 × 352,937.96
  4. Step 4: Simplify right side
    639,417.80x = 311,431,267,385.36
  5. Step 5: Solve for x
    x = 311,431,267,385.36/639,417.80
  6. Step 6: Final answer
    x = 487,054.42

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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.