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Finding the Fourth Proportional to 392,415.40, 587,456.70 and 234,562.60

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Solution

The fourth proportional to 392,415.40, 587,456.70 and 234,562.60 is: 351,146.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,415.40 : 587,456.70 = 234,562.60 : x
  2. Step 2: Convert to fraction form
    392,415.40/587,456.70 = 234,562.60/x
  3. Step 3: Cross multiply
    392,415.40x = 587,456.70 × 234,562.60
  4. Step 4: Simplify right side
    392,415.40x = 137,795,370,939.42
  5. Step 5: Solve for x
    x = 137,795,370,939.42/392,415.40
  6. Step 6: Final answer
    x = 351,146.70

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1.5x scale

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.