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Finding the Fourth Proportional to 478,906.40, 718,456.80 and 163,395.20

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Solution

The fourth proportional to 478,906.40, 718,456.80 and 163,395.20 is: 245,125.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,906.40 : 718,456.80 = 163,395.20 : x
  2. Step 2: Convert to fraction form
    478,906.40/718,456.80 = 163,395.20/x
  3. Step 3: Cross multiply
    478,906.40x = 718,456.80 × 163,395.20
  4. Step 4: Simplify right side
    478,906.40x = 117,392,392,527.36
  5. Step 5: Solve for x
    x = 117,392,392,527.36/478,906.40
  6. Step 6: Final answer
    x = 245,125.96

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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.