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Finding the Fourth Proportional to 478,940.80, 718,281.60 and 141,980.80

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Solution

The fourth proportional to 478,940.80, 718,281.60 and 141,980.80 is: 212,932.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,940.80 : 718,281.60 = 141,980.80 : x
  2. Step 2: Convert to fraction form
    478,940.80/718,281.60 = 141,980.80/x
  3. Step 3: Cross multiply
    478,940.80x = 718,281.60 × 141,980.80
  4. Step 4: Simplify right side
    478,940.80x = 101,982,196,193.28
  5. Step 5: Solve for x
    x = 101,982,196,193.28/478,940.80
  6. Step 6: Final answer
    x = 212,932.78

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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.