Home / 399,638.14-551,494.20-218,346.18

Finding the Fourth Proportional to 399,638.14, 551,494.20 and 218,346.18

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Solution

The fourth proportional to 399,638.14, 551,494.20 and 218,346.18 is: 301,314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,638.14 : 551,494.20 = 218,346.18 : x
  2. Step 2: Convert to fraction form
    399,638.14/551,494.20 = 218,346.18/x
  3. Step 3: Cross multiply
    399,638.14x = 551,494.20 × 218,346.18
  4. Step 4: Simplify right side
    399,638.14x = 120,416,651,862.16
  5. Step 5: Solve for x
    x = 120,416,651,862.16/399,638.14
  6. Step 6: Final answer
    x = 301,314.21

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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.