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Finding the Fourth Proportional to 642,605.88, 963,835.38 and 169,328.28

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Solution

The fourth proportional to 642,605.88, 963,835.38 and 169,328.28 is: 253,973.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,605.88 : 963,835.38 = 169,328.28 : x
  2. Step 2: Convert to fraction form
    642,605.88/963,835.38 = 169,328.28/x
  3. Step 3: Cross multiply
    642,605.88x = 963,835.38 × 169,328.28
  4. Step 4: Simplify right side
    642,605.88x = 163,204,587,098.55
  5. Step 5: Solve for x
    x = 163,204,587,098.55/642,605.88
  6. Step 6: Final answer
    x = 253,973.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.