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Finding the Fourth Proportional to 319,917.40, 480,041.70 and 130,516.60

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Solution

The fourth proportional to 319,917.40, 480,041.70 and 130,516.60 is: 195,842.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,917.40 : 480,041.70 = 130,516.60 : x
  2. Step 2: Convert to fraction form
    319,917.40/480,041.70 = 130,516.60/x
  3. Step 3: Cross multiply
    319,917.40x = 480,041.70 × 130,516.60
  4. Step 4: Simplify right side
    319,917.40x = 62,653,410,542.22
  5. Step 5: Solve for x
    x = 62,653,410,542.22/319,917.40
  6. Step 6: Final answer
    x = 195,842.46

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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.