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Finding the Fourth Proportional to 325,307.77, 487,980.80 and 125,629.20

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Solution

The fourth proportional to 325,307.77, 487,980.80 and 125,629.20 is: 188,451.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,307.77 : 487,980.80 = 125,629.20 : x
  2. Step 2: Convert to fraction form
    325,307.77/487,980.80 = 125,629.20/x
  3. Step 3: Cross multiply
    325,307.77x = 487,980.80 × 125,629.20
  4. Step 4: Simplify right side
    325,307.77x = 61,304,637,519.36
  5. Step 5: Solve for x
    x = 61,304,637,519.36/325,307.77
  6. Step 6: Final answer
    x = 188,451.19

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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.