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Finding the Fourth Proportional to 641,871.84, 885,796.98 and 351,495.66

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Solution

The fourth proportional to 641,871.84, 885,796.98 and 351,495.66 is: 485,071.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,871.84 : 885,796.98 = 351,495.66 : x
  2. Step 2: Convert to fraction form
    641,871.84/885,796.98 = 351,495.66/x
  3. Step 3: Cross multiply
    641,871.84x = 885,796.98 × 351,495.66
  4. Step 4: Simplify right side
    641,871.84x = 311,353,794,111.11
  5. Step 5: Solve for x
    x = 311,353,794,111.11/641,871.84
  6. Step 6: Final answer
    x = 485,071.59

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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.