Home / 399,815.08-551,759.65-218,539.21

Finding the Fourth Proportional to 399,815.08, 551,759.65 and 218,539.21

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Solution

The fourth proportional to 399,815.08, 551,759.65 and 218,539.21 is: 301,592.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,815.08 : 551,759.65 = 218,539.21 : x
  2. Step 2: Convert to fraction form
    399,815.08/551,759.65 = 218,539.21/x
  3. Step 3: Cross multiply
    399,815.08x = 551,759.65 × 218,539.21
  4. Step 4: Simplify right side
    399,815.08x = 120,581,116,095.13
  5. Step 5: Solve for x
    x = 120,581,116,095.13/399,815.08
  6. Step 6: Final answer
    x = 301,592.22

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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.