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Finding the Fourth Proportional to 391,526.20, 587,289.30 and 346,911.40

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Solution

The fourth proportional to 391,526.20, 587,289.30 and 346,911.40 is: 520,367.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,526.20 : 587,289.30 = 346,911.40 : x
  2. Step 2: Convert to fraction form
    391,526.20/587,289.30 = 346,911.40/x
  3. Step 3: Cross multiply
    391,526.20x = 587,289.30 × 346,911.40
  4. Step 4: Simplify right side
    391,526.20x = 203,737,353,268.02
  5. Step 5: Solve for x
    x = 203,737,353,268.02/391,526.20
  6. Step 6: Final answer
    x = 520,367.10

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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.