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Finding the Fourth Proportional to 417,619.70, 626,521.88 and 177,720.98

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Solution

The fourth proportional to 417,619.70, 626,521.88 and 177,720.98 is: 266,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,619.70 : 626,521.88 = 177,720.98 : x
  2. Step 2: Convert to fraction form
    417,619.70/626,521.88 = 177,720.98/x
  3. Step 3: Cross multiply
    417,619.70x = 626,521.88 × 177,720.98
  4. Step 4: Simplify right side
    417,619.70x = 111,346,078,483.83
  5. Step 5: Solve for x
    x = 111,346,078,483.83/417,619.70
  6. Step 6: Final answer
    x = 266,620.76

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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.