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Finding the Fourth Proportional to 318,866.20, 478,366.76 and 105,622.03

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Solution

The fourth proportional to 318,866.20, 478,366.76 and 105,622.03 is: 158,455.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,866.20 : 478,366.76 = 105,622.03 : x
  2. Step 2: Convert to fraction form
    318,866.20/478,366.76 = 105,622.03/x
  3. Step 3: Cross multiply
    318,866.20x = 478,366.76 × 105,622.03
  4. Step 4: Simplify right side
    318,866.20x = 50,526,068,275.72
  5. Step 5: Solve for x
    x = 50,526,068,275.72/318,866.20
  6. Step 6: Final answer
    x = 158,455.39

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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.