Home / 205,309.20-307,272.60-188,720.40

Finding the Fourth Proportional to 205,309.20, 307,272.60 and 188,720.40

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Solution

The fourth proportional to 205,309.20, 307,272.60 and 188,720.40 is: 282,445.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,309.20 : 307,272.60 = 188,720.40 : x
  2. Step 2: Convert to fraction form
    205,309.20/307,272.60 = 188,720.40/x
  3. Step 3: Cross multiply
    205,309.20x = 307,272.60 × 188,720.40
  4. Step 4: Simplify right side
    205,309.20x = 57,988,607,981.04
  5. Step 5: Solve for x
    x = 57,988,607,981.04/205,309.20
  6. Step 6: Final answer
    x = 282,445.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.