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Finding the Fourth Proportional to 439,254.40, 658,492.80 and 392,015.20

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Solution

The fourth proportional to 439,254.40, 658,492.80 and 392,015.20 is: 587,675.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,254.40 : 658,492.80 = 392,015.20 : x
  2. Step 2: Convert to fraction form
    439,254.40/658,492.80 = 392,015.20/x
  3. Step 3: Cross multiply
    439,254.40x = 658,492.80 × 392,015.20
  4. Step 4: Simplify right side
    439,254.40x = 258,139,186,690.56
  5. Step 5: Solve for x
    x = 258,139,186,690.56/439,254.40
  6. Step 6: Final answer
    x = 587,675.81

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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.