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Finding the Fourth Proportional to 628,645.95, 867,605.27 and 353,049.09

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Solution

The fourth proportional to 628,645.95, 867,605.27 and 353,049.09 is: 487,249.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,645.95 : 867,605.27 = 353,049.09 : x
  2. Step 2: Convert to fraction form
    628,645.95/867,605.27 = 353,049.09/x
  3. Step 3: Cross multiply
    628,645.95x = 867,605.27 × 353,049.09
  4. Step 4: Simplify right side
    628,645.95x = 306,307,249,287.46
  5. Step 5: Solve for x
    x = 306,307,249,287.46/628,645.95
  6. Step 6: Final answer
    x = 487,249.22

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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.