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Finding the Fourth Proportional to 398,866.32, 598,303.20 and 118,383.60

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Solution

The fourth proportional to 398,866.32, 598,303.20 and 118,383.60 is: 177,576.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,866.32 : 598,303.20 = 118,383.60 : x
  2. Step 2: Convert to fraction form
    398,866.32/598,303.20 = 118,383.60/x
  3. Step 3: Cross multiply
    398,866.32x = 598,303.20 × 118,383.60
  4. Step 4: Simplify right side
    398,866.32x = 70,829,286,707.52
  5. Step 5: Solve for x
    x = 70,829,286,707.52/398,866.32
  6. Step 6: Final answer
    x = 177,576.50

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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.