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Finding the Fourth Proportional to 238,986.40, 358,479.60 and 164,336.80

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Solution

The fourth proportional to 238,986.40, 358,479.60 and 164,336.80 is: 246,505.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,986.40 : 358,479.60 = 164,336.80 : x
  2. Step 2: Convert to fraction form
    238,986.40/358,479.60 = 164,336.80/x
  3. Step 3: Cross multiply
    238,986.40x = 358,479.60 × 164,336.80
  4. Step 4: Simplify right side
    238,986.40x = 58,911,390,329.28
  5. Step 5: Solve for x
    x = 58,911,390,329.28/238,986.40
  6. Step 6: Final answer
    x = 246,505.20

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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.