Home / 399,715.21-551,583.45-218,391.04

Finding the Fourth Proportional to 399,715.21, 551,583.45 and 218,391.04

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Solution

The fourth proportional to 399,715.21, 551,583.45 and 218,391.04 is: 301,366.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,715.21 : 551,583.45 = 218,391.04 : x
  2. Step 2: Convert to fraction form
    399,715.21/551,583.45 = 218,391.04/x
  3. Step 3: Cross multiply
    399,715.21x = 551,583.45 × 218,391.04
  4. Step 4: Simplify right side
    399,715.21x = 120,460,883,292.29
  5. Step 5: Solve for x
    x = 120,460,883,292.29/399,715.21
  6. Step 6: Final answer
    x = 301,366.77

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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.