Home / 399,715.10-551,583.42-218,428.45

Finding the Fourth Proportional to 399,715.10, 551,583.42 and 218,428.45

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Solution

The fourth proportional to 399,715.10, 551,583.42 and 218,428.45 is: 301,418.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,715.10 : 551,583.42 = 218,428.45 : x
  2. Step 2: Convert to fraction form
    399,715.10/551,583.42 = 218,428.45/x
  3. Step 3: Cross multiply
    399,715.10x = 551,583.42 × 218,428.45
  4. Step 4: Simplify right side
    399,715.10x = 120,481,510,506.89
  5. Step 5: Solve for x
    x = 120,481,510,506.89/399,715.10
  6. Step 6: Final answer
    x = 301,418.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.