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Finding the Fourth Proportional to 340,480.80, 510,721.20 and 91,162.80

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Solution

The fourth proportional to 340,480.80, 510,721.20 and 91,162.80 is: 136,744.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,480.80 : 510,721.20 = 91,162.80 : x
  2. Step 2: Convert to fraction form
    340,480.80/510,721.20 = 91,162.80/x
  3. Step 3: Cross multiply
    340,480.80x = 510,721.20 × 91,162.80
  4. Step 4: Simplify right side
    340,480.80x = 46,558,774,611.36
  5. Step 5: Solve for x
    x = 46,558,774,611.36/340,480.80
  6. Step 6: Final answer
    x = 136,744.20

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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.