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Finding the Fourth Proportional to 356,611.71, 492,174.60 and 220,689.46

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Solution

The fourth proportional to 356,611.71, 492,174.60 and 220,689.46 is: 304,582.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,611.71 : 492,174.60 = 220,689.46 : x
  2. Step 2: Convert to fraction form
    356,611.71/492,174.60 = 220,689.46/x
  3. Step 3: Cross multiply
    356,611.71x = 492,174.60 × 220,689.46
  4. Step 4: Simplify right side
    356,611.71x = 108,617,746,487.35
  5. Step 5: Solve for x
    x = 108,617,746,487.35/356,611.71
  6. Step 6: Final answer
    x = 304,582.67

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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.