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Finding the Fourth Proportional to 392,903.74, 542,339.90 and 255,270.97

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Solution

The fourth proportional to 392,903.74, 542,339.90 and 255,270.97 is: 352,360.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,903.74 : 542,339.90 = 255,270.97 : x
  2. Step 2: Convert to fraction form
    392,903.74/542,339.90 = 255,270.97/x
  3. Step 3: Cross multiply
    392,903.74x = 542,339.90 × 255,270.97
  4. Step 4: Simplify right side
    392,903.74x = 138,443,632,342.70
  5. Step 5: Solve for x
    x = 138,443,632,342.70/392,903.74
  6. Step 6: Final answer
    x = 352,360.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.