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Finding the Fourth Proportional to 542,409.20, 812,811.90 and 392,964.20

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Solution

The fourth proportional to 542,409.20, 812,811.90 and 392,964.20 is: 588,865.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,409.20 : 812,811.90 = 392,964.20 : x
  2. Step 2: Convert to fraction form
    542,409.20/812,811.90 = 392,964.20/x
  3. Step 3: Cross multiply
    542,409.20x = 812,811.90 × 392,964.20
  4. Step 4: Simplify right side
    542,409.20x = 319,405,978,033.98
  5. Step 5: Solve for x
    x = 319,405,978,033.98/542,409.20
  6. Step 6: Final answer
    x = 588,865.34

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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.