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Finding the Fourth Proportional to 399,859.83, 551,806.54 and 218,572.51

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Solution

The fourth proportional to 399,859.83, 551,806.54 and 218,572.51 is: 301,630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,859.83 : 551,806.54 = 218,572.51 : x
  2. Step 2: Convert to fraction form
    399,859.83/551,806.54 = 218,572.51/x
  3. Step 3: Cross multiply
    399,859.83x = 551,806.54 × 218,572.51
  4. Step 4: Simplify right side
    399,859.83x = 120,609,740,482.22
  5. Step 5: Solve for x
    x = 120,609,740,482.22/399,859.83
  6. Step 6: Final answer
    x = 301,630.05

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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.