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Finding the Fourth Proportional to 306,806.40, 459,957.96 and 138,276.18

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Solution

The fourth proportional to 306,806.40, 459,957.96 and 138,276.18 is: 207,300.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,806.40 : 459,957.96 = 138,276.18 : x
  2. Step 2: Convert to fraction form
    306,806.40/459,957.96 = 138,276.18/x
  3. Step 3: Cross multiply
    306,806.40x = 459,957.96 × 138,276.18
  4. Step 4: Simplify right side
    306,806.40x = 63,601,229,669.39
  5. Step 5: Solve for x
    x = 63,601,229,669.39/306,806.40
  6. Step 6: Final answer
    x = 207,300.86

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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.