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Finding the Fourth Proportional to 455,411.20, 683,116.80 and 218,696.80

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Solution

The fourth proportional to 455,411.20, 683,116.80 and 218,696.80 is: 328,045.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,411.20 : 683,116.80 = 218,696.80 : x
  2. Step 2: Convert to fraction form
    455,411.20/683,116.80 = 218,696.80/x
  3. Step 3: Cross multiply
    455,411.20x = 683,116.80 × 218,696.80
  4. Step 4: Simplify right side
    455,411.20x = 149,395,458,186.24
  5. Step 5: Solve for x
    x = 149,395,458,186.24/455,411.20
  6. Step 6: Final answer
    x = 328,045.20

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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.