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Finding the Fourth Proportional to 478,508.40, 717,859.80 and 162,997.20

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Solution

The fourth proportional to 478,508.40, 717,859.80 and 162,997.20 is: 244,528.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,508.40 : 717,859.80 = 162,997.20 : x
  2. Step 2: Convert to fraction form
    478,508.40/717,859.80 = 162,997.20/x
  3. Step 3: Cross multiply
    478,508.40x = 717,859.80 × 162,997.20
  4. Step 4: Simplify right side
    478,508.40x = 117,009,137,392.56
  5. Step 5: Solve for x
    x = 117,009,137,392.56/478,508.40
  6. Step 6: Final answer
    x = 244,528.91

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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.