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Finding the Fourth Proportional to 407,688.40, 611,532.60 and 108,168.40

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Solution

The fourth proportional to 407,688.40, 611,532.60 and 108,168.40 is: 162,252.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,688.40 : 611,532.60 = 108,168.40 : x
  2. Step 2: Convert to fraction form
    407,688.40/611,532.60 = 108,168.40/x
  3. Step 3: Cross multiply
    407,688.40x = 611,532.60 × 108,168.40
  4. Step 4: Simplify right side
    407,688.40x = 66,148,502,889.84
  5. Step 5: Solve for x
    x = 66,148,502,889.84/407,688.40
  6. Step 6: Final answer
    x = 162,252.60

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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.