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Finding the Fourth Proportional to 542,406.20, 812,807.40 and 392,961.20

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Solution

The fourth proportional to 542,406.20, 812,807.40 and 392,961.20 is: 588,860.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,406.20 : 812,807.40 = 392,961.20 : x
  2. Step 2: Convert to fraction form
    542,406.20/812,807.40 = 392,961.20/x
  3. Step 3: Cross multiply
    542,406.20x = 812,807.40 × 392,961.20
  4. Step 4: Simplify right side
    542,406.20x = 319,401,771,272.88
  5. Step 5: Solve for x
    x = 319,401,771,272.88/542,406.20
  6. Step 6: Final answer
    x = 588,860.84

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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.