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Finding the Fourth Proportional to 417,880.80, 626,821.20 and 102,340.80

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Solution

The fourth proportional to 417,880.80, 626,821.20 and 102,340.80 is: 153,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,880.80 : 626,821.20 = 102,340.80 : x
  2. Step 2: Convert to fraction form
    417,880.80/626,821.20 = 102,340.80/x
  3. Step 3: Cross multiply
    417,880.80x = 626,821.20 × 102,340.80
  4. Step 4: Simplify right side
    417,880.80x = 64,149,383,064.96
  5. Step 5: Solve for x
    x = 64,149,383,064.96/417,880.80
  6. Step 6: Final answer
    x = 153,511.20

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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.