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Finding the Fourth Proportional to 642,494.70, 963,669.15 and 169,217.10

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Solution

The fourth proportional to 642,494.70, 963,669.15 and 169,217.10 is: 253,806.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,494.70 : 963,669.15 = 169,217.10 : x
  2. Step 2: Convert to fraction form
    642,494.70/963,669.15 = 169,217.10/x
  3. Step 3: Cross multiply
    642,494.70x = 963,669.15 × 169,217.10
  4. Step 4: Simplify right side
    642,494.70x = 163,069,298,922.47
  5. Step 5: Solve for x
    x = 163,069,298,922.47/642,494.70
  6. Step 6: Final answer
    x = 253,806.45

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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.