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Finding the Fourth Proportional to 519,816.70, 779,785.80 and 164,866.60

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Solution

The fourth proportional to 519,816.70, 779,785.80 and 164,866.60 is: 247,319.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,816.70 : 779,785.80 = 164,866.60 : x
  2. Step 2: Convert to fraction form
    519,816.70/779,785.80 = 164,866.60/x
  3. Step 3: Cross multiply
    519,816.70x = 779,785.80 × 164,866.60
  4. Step 4: Simplify right side
    519,816.70x = 128,560,633,574.28
  5. Step 5: Solve for x
    x = 128,560,633,574.28/519,816.70
  6. Step 6: Final answer
    x = 247,319.17

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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.