Home / 278,985.33-384,991.65-158,137.74

Finding the Fourth Proportional to 278,985.33, 384,991.65 and 158,137.74

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Solution

The fourth proportional to 278,985.33, 384,991.65 and 158,137.74 is: 218,225.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,985.33 : 384,991.65 = 158,137.74 : x
  2. Step 2: Convert to fraction form
    278,985.33/384,991.65 = 158,137.74/x
  3. Step 3: Cross multiply
    278,985.33x = 384,991.65 × 158,137.74
  4. Step 4: Simplify right side
    278,985.33x = 60,881,709,449.87
  5. Step 5: Solve for x
    x = 60,881,709,449.87/278,985.33
  6. Step 6: Final answer
    x = 218,225.49

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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.