Home / 389,802.05-538,443.08-313,608.18

Finding the Fourth Proportional to 389,802.05, 538,443.08 and 313,608.18

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Solution

The fourth proportional to 389,802.05, 538,443.08 and 313,608.18 is: 433,194.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,802.05 : 538,443.08 = 313,608.18 : x
  2. Step 2: Convert to fraction form
    389,802.05/538,443.08 = 313,608.18/x
  3. Step 3: Cross multiply
    389,802.05x = 538,443.08 × 313,608.18
  4. Step 4: Simplify right side
    389,802.05x = 168,860,154,352.39
  5. Step 5: Solve for x
    x = 168,860,154,352.39/389,802.05
  6. Step 6: Final answer
    x = 433,194.63

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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.